Struct OffsetDateTime

pub struct OffsetDateTime {
    local_date_time: PrimitiveDateTime,
    offset: UtcOffset,
}

A PrimitiveDateTime with a UtcOffset.

All comparisons are performed using the UTC time.

Fields

local_date_time: PrimitiveDateTime

offset: UtcOffset

Implementations

impl OffsetDateTime

pub const UNIX_EPOCH: Self = _

Midnight, 1 January, 1970 (UTC).

assert_eq!(OffsetDateTime::UNIX_EPOCH, datetime!(1970-01-01 0:00 UTC),);

pub fn now_utc() -> Self

Create a new OffsetDateTime with the current date and time in UTC.

assert!(OffsetDateTime::now_utc().year() >= 2019);
assert_eq!(OffsetDateTime::now_utc().offset(), offset!(UTC));

pub fn now_local() -> Result<Self, IndeterminateOffset>

Attempt to create a new OffsetDateTime with the current date and time in the local offset. If the offset cannot be determined, an error is returned.

assert!(OffsetDateTime::now_local().is_ok());

pub const fn new_in_offset(date: Date, time: Time, offset: UtcOffset) -> Self

Create a new OffsetDateTime with the given Date, Time, and UtcOffset.

let dt = OffsetDateTime::new_in_offset(
    Date::from_calendar_date(2024, Month::January, 1)?,
    Time::from_hms_nano(12, 59, 59, 500_000_000)?,
    UtcOffset::from_hms(-5, 0, 0)?,
);
assert_eq!(dt, datetime!(2024-01-01 12:59:59.5 -5));

pub const fn new_utc(date: Date, time: Time) -> Self

Create a new OffsetDateTime with the given Date and Time in the UTC timezone.

let dt = OffsetDateTime::new_utc(
    Date::from_calendar_date(2024, Month::January, 1)?,
    Time::from_hms_nano(12, 59, 59, 500_000_000)?,
);
assert_eq!(dt, datetime!(2024-01-01 12:59:59.5 UTC));

pub const fn to_offset(self, offset: UtcOffset) -> Self

Convert the OffsetDateTime from the current UtcOffset to the provided UtcOffset.

assert_eq!(
    datetime!(2000-01-01 0:00 UTC)
        .to_offset(offset!(-1))
        .year(),
    1999,
);

// Let's see what time Sydney's new year's celebration is in New York and Los Angeles.

// Construct midnight on new year's in Sydney.
let sydney = datetime!(2000-01-01 0:00 +11);
let new_york = sydney.to_offset(offset!(-5));
let los_angeles = sydney.to_offset(offset!(-8));
assert_eq!(sydney.hour(), 0);
assert_eq!(new_york.hour(), 8);
assert_eq!(los_angeles.hour(), 5);

Panics

This method panics if the local date-time in the new offset is outside the supported range.

pub const fn checked_to_offset(self, offset: UtcOffset) -> Option<Self>

Convert the OffsetDateTime from the current UtcOffset to the provided UtcOffset, returning None if the date-time in the resulting offset is invalid.

assert_eq!(
    datetime!(2000-01-01 0:00 UTC)
        .checked_to_offset(offset!(-1))
        .unwrap()
        .year(),
    1999,
);
assert_eq!(
    PrimitiveDateTime::MAX
        .assume_utc()
        .checked_to_offset(offset!(+1)),
    None,
);

pub(crate) const fn to_offset_raw(self, offset: UtcOffset) -> (i32, u16, Time)

Equivalent to .to_offset(UtcOffset::UTC), but returning the year, ordinal, and time. This avoids constructing an invalid Date if the new value is out of range.

pub const fn from_unix_timestamp(timestamp: i64) -> Result<Self, ComponentRange>

Create an OffsetDateTime from the provided Unix timestamp. Calling .offset() on the resulting value is guaranteed to return UTC.

assert_eq!(
    OffsetDateTime::from_unix_timestamp(0),
    Ok(OffsetDateTime::UNIX_EPOCH),
);
assert_eq!(
    OffsetDateTime::from_unix_timestamp(1_546_300_800),
    Ok(datetime!(2019-01-01 0:00 UTC)),
);

If you have a timestamp-nanosecond pair, you can use something along the lines of the following:

let (timestamp, nanos) = (1, 500_000_000);
assert_eq!(
    OffsetDateTime::from_unix_timestamp(timestamp)? + Duration::nanoseconds(nanos),
    OffsetDateTime::UNIX_EPOCH + 1.5.seconds()
);

pub const fn from_unix_timestamp_nanos( timestamp: i128, ) -> Result<Self, ComponentRange>

Construct an OffsetDateTime from the provided Unix timestamp (in nanoseconds). Calling .offset() on the resulting value is guaranteed to return UTC.

assert_eq!(
    OffsetDateTime::from_unix_timestamp_nanos(0),
    Ok(OffsetDateTime::UNIX_EPOCH),
);
assert_eq!(
    OffsetDateTime::from_unix_timestamp_nanos(1_546_300_800_000_000_000),
    Ok(datetime!(2019-01-01 0:00 UTC)),
);

pub const fn offset(self) -> UtcOffset

Get the UtcOffset.

assert_eq!(datetime!(2019-01-01 0:00 UTC).offset(), offset!(UTC));
assert_eq!(datetime!(2019-01-01 0:00 +1).offset(), offset!(+1));

pub const fn unix_timestamp(self) -> i64

Get the Unix timestamp.

assert_eq!(datetime!(1970-01-01 0:00 UTC).unix_timestamp(), 0);
assert_eq!(datetime!(1970-01-01 0:00 -1).unix_timestamp(), 3_600);

pub const fn unix_timestamp_nanos(self) -> i128

Get the Unix timestamp in nanoseconds.

use time_macros::datetime;
assert_eq!(datetime!(1970-01-01 0:00 UTC).unix_timestamp_nanos(), 0);
assert_eq!(
    datetime!(1970-01-01 0:00 -1).unix_timestamp_nanos(),
    3_600_000_000_000,
);

const fn date_time(self) -> PrimitiveDateTime

Get the PrimitiveDateTime in the stored offset.

pub const fn date(self) -> Date

Get the Date in the stored offset.

assert_eq!(datetime!(2019-01-01 0:00 UTC).date(), date!(2019-01-01));
assert_eq!(
    datetime!(2019-01-01 0:00 UTC)
        .to_offset(offset!(-1))
        .date(),
    date!(2018-12-31),
);

pub const fn time(self) -> Time

Get the Time in the stored offset.

assert_eq!(datetime!(2019-01-01 0:00 UTC).time(), time!(0:00));
assert_eq!(
    datetime!(2019-01-01 0:00 UTC)
        .to_offset(offset!(-1))
        .time(),
    time!(23:00)
);

pub const fn year(self) -> i32

Get the year of the date in the stored offset.

assert_eq!(datetime!(2019-01-01 0:00 UTC).year(), 2019);
assert_eq!(
    datetime!(2019-12-31 23:00 UTC)
        .to_offset(offset!(+1))
        .year(),
    2020,
);
assert_eq!(datetime!(2020-01-01 0:00 UTC).year(), 2020);

pub const fn month(self) -> Month

Get the month of the date in the stored offset.

assert_eq!(datetime!(2019-01-01 0:00 UTC).month(), Month::January);
assert_eq!(
    datetime!(2019-12-31 23:00 UTC)
        .to_offset(offset!(+1))
        .month(),
    Month::January,
);

pub const fn day(self) -> u8

Get the day of the date in the stored offset.

The returned value will always be in the range 1..=31.

assert_eq!(datetime!(2019-01-01 0:00 UTC).day(), 1);
assert_eq!(
    datetime!(2019-12-31 23:00 UTC)
        .to_offset(offset!(+1))
        .day(),
    1,
);

pub const fn ordinal(self) -> u16

Get the day of the year of the date in the stored offset.

The returned value will always be in the range 1..=366.

assert_eq!(datetime!(2019-01-01 0:00 UTC).ordinal(), 1);
assert_eq!(
    datetime!(2019-12-31 23:00 UTC)
        .to_offset(offset!(+1))
        .ordinal(),
    1,
);

pub const fn iso_week(self) -> u8

Get the ISO week number of the date in the stored offset.

The returned value will always be in the range 1..=53.

assert_eq!(datetime!(2019-01-01 0:00 UTC).iso_week(), 1);
assert_eq!(datetime!(2020-01-01 0:00 UTC).iso_week(), 1);
assert_eq!(datetime!(2020-12-31 0:00 UTC).iso_week(), 53);
assert_eq!(datetime!(2021-01-01 0:00 UTC).iso_week(), 53);

pub const fn sunday_based_week(self) -> u8

Get the week number where week 1 begins on the first Sunday.

The returned value will always be in the range 0..=53.

assert_eq!(datetime!(2019-01-01 0:00 UTC).sunday_based_week(), 0);
assert_eq!(datetime!(2020-01-01 0:00 UTC).sunday_based_week(), 0);
assert_eq!(datetime!(2020-12-31 0:00 UTC).sunday_based_week(), 52);
assert_eq!(datetime!(2021-01-01 0:00 UTC).sunday_based_week(), 0);

pub const fn monday_based_week(self) -> u8

Get the week number where week 1 begins on the first Monday.

The returned value will always be in the range 0..=53.

assert_eq!(datetime!(2019-01-01 0:00 UTC).monday_based_week(), 0);
assert_eq!(datetime!(2020-01-01 0:00 UTC).monday_based_week(), 0);
assert_eq!(datetime!(2020-12-31 0:00 UTC).monday_based_week(), 52);
assert_eq!(datetime!(2021-01-01 0:00 UTC).monday_based_week(), 0);

pub const fn to_calendar_date(self) -> (i32, Month, u8)

Get the year, month, and day.

assert_eq!(
    datetime!(2019-01-01 0:00 UTC).to_calendar_date(),
    (2019, Month::January, 1)
);

pub const fn to_ordinal_date(self) -> (i32, u16)

Get the year and ordinal day number.

assert_eq!(
    datetime!(2019-01-01 0:00 UTC).to_ordinal_date(),
    (2019, 1)
);

pub const fn to_iso_week_date(self) -> (i32, u8, Weekday)

Get the ISO 8601 year, week number, and weekday.

assert_eq!(
    datetime!(2019-01-01 0:00 UTC).to_iso_week_date(),
    (2019, 1, Tuesday)
);
assert_eq!(
    datetime!(2019-10-04 0:00 UTC).to_iso_week_date(),
    (2019, 40, Friday)
);
assert_eq!(
    datetime!(2020-01-01 0:00 UTC).to_iso_week_date(),
    (2020, 1, Wednesday)
);
assert_eq!(
    datetime!(2020-12-31 0:00 UTC).to_iso_week_date(),
    (2020, 53, Thursday)
);
assert_eq!(
    datetime!(2021-01-01 0:00 UTC).to_iso_week_date(),
    (2020, 53, Friday)
);

pub const fn weekday(self) -> Weekday

Get the weekday of the date in the stored offset.

assert_eq!(datetime!(2019-01-01 0:00 UTC).weekday(), Tuesday);
assert_eq!(datetime!(2019-02-01 0:00 UTC).weekday(), Friday);
assert_eq!(datetime!(2019-03-01 0:00 UTC).weekday(), Friday);

pub const fn to_julian_day(self) -> i32

Get the Julian day for the date. The time is not taken into account for this calculation.

The algorithm to perform this conversion is derived from one provided by Peter Baum; it is freely available here.

assert_eq!(datetime!(-4713-11-24 0:00 UTC).to_julian_day(), 0);
assert_eq!(datetime!(2000-01-01 0:00 UTC).to_julian_day(), 2_451_545);
assert_eq!(datetime!(2019-01-01 0:00 UTC).to_julian_day(), 2_458_485);
assert_eq!(datetime!(2019-12-31 0:00 UTC).to_julian_day(), 2_458_849);

pub const fn to_hms(self) -> (u8, u8, u8)

Get the clock hour, minute, and second.

assert_eq!(datetime!(2020-01-01 0:00:00 UTC).to_hms(), (0, 0, 0));
assert_eq!(datetime!(2020-01-01 23:59:59 UTC).to_hms(), (23, 59, 59));

pub const fn to_hms_milli(self) -> (u8, u8, u8, u16)

Get the clock hour, minute, second, and millisecond.

assert_eq!(
    datetime!(2020-01-01 0:00:00 UTC).to_hms_milli(),
    (0, 0, 0, 0)
);
assert_eq!(
    datetime!(2020-01-01 23:59:59.999 UTC).to_hms_milli(),
    (23, 59, 59, 999)
);

pub const fn to_hms_micro(self) -> (u8, u8, u8, u32)

Get the clock hour, minute, second, and microsecond.

assert_eq!(
    datetime!(2020-01-01 0:00:00 UTC).to_hms_micro(),
    (0, 0, 0, 0)
);
assert_eq!(
    datetime!(2020-01-01 23:59:59.999_999 UTC).to_hms_micro(),
    (23, 59, 59, 999_999)
);

pub const fn to_hms_nano(self) -> (u8, u8, u8, u32)

Get the clock hour, minute, second, and nanosecond.

assert_eq!(
    datetime!(2020-01-01 0:00:00 UTC).to_hms_nano(),
    (0, 0, 0, 0)
);
assert_eq!(
    datetime!(2020-01-01 23:59:59.999_999_999 UTC).to_hms_nano(),
    (23, 59, 59, 999_999_999)
);

pub const fn hour(self) -> u8

Get the clock hour in the stored offset.

The returned value will always be in the range 0..24.

assert_eq!(datetime!(2019-01-01 0:00 UTC).hour(), 0);
assert_eq!(
    datetime!(2019-01-01 23:59:59 UTC)
        .to_offset(offset!(-2))
        .hour(),
    21,
);

pub const fn minute(self) -> u8

Get the minute within the hour in the stored offset.

The returned value will always be in the range 0..60.

assert_eq!(datetime!(2019-01-01 0:00 UTC).minute(), 0);
assert_eq!(
    datetime!(2019-01-01 23:59:59 UTC)
        .to_offset(offset!(+0:30))
        .minute(),
    29,
);

pub const fn second(self) -> u8

Get the second within the minute in the stored offset.

The returned value will always be in the range 0..60.

assert_eq!(datetime!(2019-01-01 0:00 UTC).second(), 0);
assert_eq!(
    datetime!(2019-01-01 23:59:59 UTC)
        .to_offset(offset!(+0:00:30))
        .second(),
    29,
);

pub const fn millisecond(self) -> u16

Get the milliseconds within the second in the stored offset.

The returned value will always be in the range 0..1_000.

assert_eq!(datetime!(2019-01-01 0:00 UTC).millisecond(), 0);
assert_eq!(datetime!(2019-01-01 23:59:59.999 UTC).millisecond(), 999);

pub const fn microsecond(self) -> u32

Get the microseconds within the second in the stored offset.

The returned value will always be in the range 0..1_000_000.

assert_eq!(datetime!(2019-01-01 0:00 UTC).microsecond(), 0);
assert_eq!(
    datetime!(2019-01-01 23:59:59.999_999 UTC).microsecond(),
    999_999,
);

pub const fn nanosecond(self) -> u32

Get the nanoseconds within the second in the stored offset.

The returned value will always be in the range 0..1_000_000_000.

assert_eq!(datetime!(2019-01-01 0:00 UTC).nanosecond(), 0);
assert_eq!(
    datetime!(2019-01-01 23:59:59.999_999_999 UTC).nanosecond(),
    999_999_999,
);

pub const fn checked_add(self, duration: Duration) -> Option<Self>

Computes self + duration, returning None if an overflow occurred.

let datetime = Date::MIN.midnight().assume_offset(offset!(+10));
assert_eq!(datetime.checked_add((-2).days()), None);

let datetime = Date::MAX.midnight().assume_offset(offset!(+10));
assert_eq!(datetime.checked_add(2.days()), None);

assert_eq!(
    datetime!(2019 - 11 - 25 15:30 +10).checked_add(27.hours()),
    Some(datetime!(2019 - 11 - 26 18:30 +10))
);

pub const fn checked_sub(self, duration: Duration) -> Option<Self>

Computes self - duration, returning None if an overflow occurred.

let datetime = Date::MIN.midnight().assume_offset(offset!(+10));
assert_eq!(datetime.checked_sub(2.days()), None);

let datetime = Date::MAX.midnight().assume_offset(offset!(+10));
assert_eq!(datetime.checked_sub((-2).days()), None);

assert_eq!(
    datetime!(2019 - 11 - 25 15:30 +10).checked_sub(27.hours()),
    Some(datetime!(2019 - 11 - 24 12:30 +10))
);

pub const fn saturating_add(self, duration: Duration) -> Self

Computes self + duration, saturating value on overflow.

assert_eq!(
    datetime!(-999999-01-01 0:00 +10).saturating_add((-2).days()),
    datetime!(-999999-01-01 0:00 +10)
);

assert_eq!(
    datetime!(+999999-12-31 23:59:59.999_999_999 +10).saturating_add(2.days()),
    datetime!(+999999-12-31 23:59:59.999_999_999 +10)
);

assert_eq!(
    datetime!(2019 - 11 - 25 15:30 +10).saturating_add(27.hours()),
    datetime!(2019 - 11 - 26 18:30 +10)
);

pub const fn saturating_sub(self, duration: Duration) -> Self

Computes self - duration, saturating value on overflow.

assert_eq!(
    datetime!(-999999-01-01 0:00 +10).saturating_sub(2.days()),
    datetime!(-999999-01-01 0:00 +10)
);

assert_eq!(
    datetime!(+999999-12-31 23:59:59.999_999_999 +10).saturating_sub((-2).days()),
    datetime!(+999999-12-31 23:59:59.999_999_999 +10)
);

assert_eq!(
    datetime!(2019 - 11 - 25 15:30 +10).saturating_sub(27.hours()),
    datetime!(2019 - 11 - 24 12:30 +10)
);

impl OffsetDateTime

Methods that replace part of the OffsetDateTime.

pub const fn replace_time(self, time: Time) -> Self

Replace the time, which is assumed to be in the stored offset. The date and offset components are unchanged.

assert_eq!(
    datetime!(2020-01-01 5:00 UTC).replace_time(time!(12:00)),
    datetime!(2020-01-01 12:00 UTC)
);
assert_eq!(
    datetime!(2020-01-01 12:00 -5).replace_time(time!(7:00)),
    datetime!(2020-01-01 7:00 -5)
);
assert_eq!(
    datetime!(2020-01-01 0:00 +1).replace_time(time!(12:00)),
    datetime!(2020-01-01 12:00 +1)
);

pub const fn replace_date(self, date: Date) -> Self

Replace the date, which is assumed to be in the stored offset. The time and offset components are unchanged.

assert_eq!(
    datetime!(2020-01-01 12:00 UTC).replace_date(date!(2020-01-30)),
    datetime!(2020-01-30 12:00 UTC)
);
assert_eq!(
    datetime!(2020-01-01 0:00 +1).replace_date(date!(2020-01-30)),
    datetime!(2020-01-30 0:00 +1)
);

pub const fn replace_date_time(self, date_time: PrimitiveDateTime) -> Self

Replace the date and time, which are assumed to be in the stored offset. The offset component remains unchanged.

assert_eq!(
    datetime!(2020-01-01 12:00 UTC).replace_date_time(datetime!(2020-01-30 16:00)),
    datetime!(2020-01-30 16:00 UTC)
);
assert_eq!(
    datetime!(2020-01-01 12:00 +1).replace_date_time(datetime!(2020-01-30 0:00)),
    datetime!(2020-01-30 0:00 +1)
);

pub const fn replace_offset(self, offset: UtcOffset) -> Self

Replace the offset. The date and time components remain unchanged.

assert_eq!(
    datetime!(2020-01-01 0:00 UTC).replace_offset(offset!(-5)),
    datetime!(2020-01-01 0:00 -5)
);

pub const fn replace_year(self, year: i32) -> Result<Self, ComponentRange>

Replace the year. The month and day will be unchanged.

assert_eq!(
    datetime!(2022 - 02 - 18 12:00 +01).replace_year(2019),
    Ok(datetime!(2019 - 02 - 18 12:00 +01))
);
assert!(datetime!(2022 - 02 - 18 12:00 +01).replace_year(-1_000_000_000).is_err()); // -1_000_000_000 isn't a valid year
assert!(datetime!(2022 - 02 - 18 12:00 +01).replace_year(1_000_000_000).is_err()); // 1_000_000_000 isn't a valid year

pub const fn replace_month(self, month: Month) -> Result<Self, ComponentRange>

Replace the month of the year.

assert_eq!(
    datetime!(2022 - 02 - 18 12:00 +01).replace_month(Month::January),
    Ok(datetime!(2022 - 01 - 18 12:00 +01))
);
assert!(datetime!(2022 - 01 - 30 12:00 +01).replace_month(Month::February).is_err()); // 30 isn't a valid day in February

pub const fn replace_day(self, day: u8) -> Result<Self, ComponentRange>

Replace the day of the month.

assert_eq!(
    datetime!(2022 - 02 - 18 12:00 +01).replace_day(1),
    Ok(datetime!(2022 - 02 - 01 12:00 +01))
);
assert!(datetime!(2022 - 02 - 18 12:00 +01).replace_day(0).is_err()); // 00 isn't a valid day
assert!(datetime!(2022 - 02 - 18 12:00 +01).replace_day(30).is_err()); // 30 isn't a valid day in February

pub const fn replace_ordinal(self, ordinal: u16) -> Result<Self, ComponentRange>

Replace the day of the year.

assert_eq!(datetime!(2022-049 12:00 +01).replace_ordinal(1), Ok(datetime!(2022-001 12:00 +01)));
assert!(datetime!(2022-049 12:00 +01).replace_ordinal(0).is_err()); // 0 isn't a valid ordinal
assert!(datetime!(2022-049 12:00 +01).replace_ordinal(366).is_err()); // 2022 isn't a leap year

pub const fn replace_hour(self, hour: u8) -> Result<Self, ComponentRange>

Replace the clock hour.

assert_eq!(
    datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_hour(7),
    Ok(datetime!(2022 - 02 - 18 07:02:03.004_005_006 +01))
);
assert!(datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_hour(24).is_err()); // 24 isn't a valid hour

pub const fn replace_minute(self, minute: u8) -> Result<Self, ComponentRange>

Replace the minutes within the hour.

assert_eq!(
    datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_minute(7),
    Ok(datetime!(2022 - 02 - 18 01:07:03.004_005_006 +01))
);
assert!(datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_minute(60).is_err()); // 60 isn't a valid minute

pub const fn replace_second(self, second: u8) -> Result<Self, ComponentRange>

Replace the seconds within the minute.

assert_eq!(
    datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_second(7),
    Ok(datetime!(2022 - 02 - 18 01:02:07.004_005_006 +01))
);
assert!(datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_second(60).is_err()); // 60 isn't a valid second

pub const fn replace_millisecond( self, millisecond: u16, ) -> Result<Self, ComponentRange>

Replace the milliseconds within the second.

assert_eq!(
    datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_millisecond(7),
    Ok(datetime!(2022 - 02 - 18 01:02:03.007 +01))
);
assert!(datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_millisecond(1_000).is_err()); // 1_000 isn't a valid millisecond

pub const fn replace_microsecond( self, microsecond: u32, ) -> Result<Self, ComponentRange>

Replace the microseconds within the second.

assert_eq!(
    datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_microsecond(7_008),
    Ok(datetime!(2022 - 02 - 18 01:02:03.007_008 +01))
);
assert!(datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_microsecond(1_000_000).is_err()); // 1_000_000 isn't a valid microsecond

pub const fn replace_nanosecond( self, nanosecond: u32, ) -> Result<Self, ComponentRange>

Replace the nanoseconds within the second.

assert_eq!(
    datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_nanosecond(7_008_009),
    Ok(datetime!(2022 - 02 - 18 01:02:03.007_008_009 +01))
);
assert!(datetime!(2022 - 02 - 18 01:02:03.004_005_006 +01).replace_nanosecond(1_000_000_000).is_err()); // 1_000_000_000 isn't a valid nanosecond

impl OffsetDateTime

pub fn format_into( self, output: &mut impl Write, format: &(impl Formattable + ?Sized), ) -> Result<usize, Format>

Format the OffsetDateTime using the provided format description.

pub fn format( self, format: &(impl Formattable + ?Sized), ) -> Result<String, Format>

Format the OffsetDateTime using the provided format description.

let format = format_description::parse(
    "[year]-[month]-[day] [hour]:[minute]:[second] [offset_hour \
         sign:mandatory]:[offset_minute]:[offset_second]",
)?;
assert_eq!(
    datetime!(2020-01-02 03:04:05 +06:07:08).format(&format)?,
    "2020-01-02 03:04:05 +06:07:08"
);

impl OffsetDateTime

pub fn parse( input: &str, description: &(impl Parsable + ?Sized), ) -> Result<Self, Parse>

Parse an OffsetDateTime from the input using the provided format description.

let format = format_description!(
    "[year]-[month]-[day] [hour]:[minute]:[second] [offset_hour \
         sign:mandatory]:[offset_minute]:[offset_second]"
);
assert_eq!(
    OffsetDateTime::parse("2020-01-02 03:04:05 +06:07:08", &format)?,
    datetime!(2020-01-02 03:04:05 +06:07:08)
);

pub(crate) const fn is_valid_leap_second_stand_in(self) -> bool

A helper method to check if the OffsetDateTime is a valid representation of a leap second. Leap seconds, when parsed, are represented as the preceding nanosecond. However, leap seconds can only occur as the last second of a month UTC.

Trait Implementations

impl Add<Duration> for OffsetDateTime

fn add(self, duration: Duration) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = OffsetDateTime

The resulting type after applying the + operator.

impl Add<Duration> for OffsetDateTime

fn add(self, duration: StdDuration) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = OffsetDateTime

The resulting type after applying the + operator.

impl AddAssign<Duration> for OffsetDateTime

fn add_assign(&mut self, rhs: Duration)

Panics

This may panic if an overflow occurs.

impl AddAssign<Duration> for OffsetDateTime

fn add_assign(&mut self, rhs: StdDuration)

Panics

This may panic if an overflow occurs.

impl Arbitrary for OffsetDateTime

fn arbitrary(g: &mut Gen) -> Self

Return an arbitrary value.

fn shrink(&self) -> Box<dyn Iterator<Item = Self>>

Return an iterator of values that are smaller than itself.

impl Clone for OffsetDateTime

fn clone(&self) -> OffsetDateTime

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for OffsetDateTime

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Deserialize<'a> for OffsetDateTime

fn deserialize<D: Deserializer<'a>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

#[doc(hidden)] fn deserialize_in_place<D>( deserializer: D, place: &mut Self, ) -> Result<(), <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserializes a value into self from the given Deserializer.

impl Display for OffsetDateTime

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Distribution<OffsetDateTime> for Standard

fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> OffsetDateTime

Generate a random value of T, using rng as the source of randomness.

fn sample_iter<R>(self, rng: R) -> DistIter<Self, R, T>

where R: Rng, Self: Sized,

Create an iterator that generates random values of T, using rng as the source of randomness.

fn map<F, S>(self, func: F) -> DistMap<Self, F, T, S>

where F: Fn(T) -> S, Self: Sized,

Create a distribution of values of ‘S’ by mapping the output of Self through the closure F

impl Eq for OffsetDateTime

#[doc(hidden)] fn assert_receiver_is_total_eq(&self)

impl From<OffsetDateTime> for SystemTime

fn from(datetime: OffsetDateTime) -> Self

Converts to this type from the input type.

impl From<SystemTime> for OffsetDateTime

fn from(system_time: SystemTime) -> Self

Converts to this type from the input type.

impl Hash for OffsetDateTime

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for OffsetDateTime

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq<OffsetDateTime> for SystemTime

fn eq(&self, rhs: &OffsetDateTime) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<SystemTime> for OffsetDateTime

fn eq(&self, rhs: &SystemTime) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for OffsetDateTime

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<OffsetDateTime> for SystemTime

fn partial_cmp(&self, other: &OffsetDateTime) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialOrd<SystemTime> for OffsetDateTime

fn partial_cmp(&self, other: &SystemTime) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialOrd for OffsetDateTime

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for OffsetDateTime

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl SmartDisplay for OffsetDateTime

type Metadata = ()

User-provided metadata type.

fn metadata(&self, _: FormatterOptions) -> Metadata<'_, Self>

Compute any information needed to format the value. This must, at a minimum, determine the width of the value before any padding is added by the formatter.

fn fmt_with_metadata( &self, f: &mut Formatter<'_>, metadata: Metadata<'_, Self>, ) -> Result

Format the value using the given formatter and metadata. The formatted output should have the width indicated by the metadata. This is before any padding is added by the formatter.

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Format the value using the given formatter. This is the same as Display::fmt.

impl Sub<Duration> for OffsetDateTime

fn sub(self, rhs: Duration) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = OffsetDateTime

The resulting type after applying the - operator.

impl Sub<Duration> for OffsetDateTime

fn sub(self, duration: StdDuration) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = OffsetDateTime

The resulting type after applying the - operator.

impl Sub<OffsetDateTime> for SystemTime

fn sub(self, rhs: OffsetDateTime) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = Duration

The resulting type after applying the - operator.

impl Sub<SystemTime> for OffsetDateTime

fn sub(self, rhs: SystemTime) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = Duration

The resulting type after applying the - operator.

impl Sub for OffsetDateTime

fn sub(self, rhs: Self) -> Self::Output

Panics

This may panic if an overflow occurs.

type Output = Duration

The resulting type after applying the - operator.

impl SubAssign<Duration> for OffsetDateTime

fn sub_assign(&mut self, rhs: Duration)

Panics

This may panic if an overflow occurs.

impl SubAssign<Duration> for OffsetDateTime

fn sub_assign(&mut self, rhs: StdDuration)

Panics

This may panic if an overflow occurs.

impl TryFrom<Parsed> for OffsetDateTime

type Error = TryFromParsed

The type returned in the event of a conversion error.

fn try_from(parsed: Parsed) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for OffsetDateTime