Struct chrono::Date

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pub struct Date<Tz: TimeZone> { /* private fields */ }
Expand description

ISO 8601 calendar date with time zone.

This type should be considered ambiguous at best, due to the inherent lack of precision required for the time zone resolution. For serialization and deserialization uses, it is best to use NaiveDate instead. There are some guarantees on the usage of Date<Tz>:

  • If properly constructed via TimeZone::ymd and others without an error, the corresponding local date should exist for at least a moment. (It may still have a gap from the offset changes.)

  • The TimeZone is free to assign any Offset to the local date, as long as that offset did occur in given day. For example, if 2015-03-08T01:59-08:00 is followed by 2015-03-08T03:00-07:00, it may produce either 2015-03-08-08:00 or 2015-03-08-07:00 but not 2015-03-08+00:00 and others.

  • Once constructed as a full DateTime, DateTime::date and other associated methods should return those for the original Date. For example, if dt = tz.ymd(y,m,d).hms(h,n,s) were valid, dt.date() == tz.ymd(y,m,d).

  • The date is timezone-agnostic up to one day (i.e. practically always), so the local date and UTC date should be equal for most cases even though the raw calculation between NaiveDate and Duration may not.

Implementations§

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impl<Tz: TimeZone> Date<Tz>

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pub fn from_utc(date: NaiveDate, offset: Tz::Offset) -> Date<Tz>

Makes a new Date with given UTC date and offset. The local date should be constructed via the TimeZone trait.

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pub fn and_time(&self, time: NaiveTime) -> Option<DateTime<Tz>>

Makes a new DateTime from the current date and given NaiveTime. The offset in the current date is preserved.

Panics on invalid datetime.

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pub fn and_hms(&self, hour: u32, min: u32, sec: u32) -> DateTime<Tz>

Makes a new DateTime from the current date, hour, minute and second. The offset in the current date is preserved.

Panics on invalid hour, minute and/or second.

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pub fn and_hms_opt(&self, hour: u32, min: u32, sec: u32) -> Option<DateTime<Tz>>

Makes a new DateTime from the current date, hour, minute and second. The offset in the current date is preserved.

Returns None on invalid hour, minute and/or second.

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pub fn and_hms_milli( &self, hour: u32, min: u32, sec: u32, milli: u32 ) -> DateTime<Tz>

Makes a new DateTime from the current date, hour, minute, second and millisecond. The millisecond part can exceed 1,000 in order to represent the leap second. The offset in the current date is preserved.

Panics on invalid hour, minute, second and/or millisecond.

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pub fn and_hms_milli_opt( &self, hour: u32, min: u32, sec: u32, milli: u32 ) -> Option<DateTime<Tz>>

Makes a new DateTime from the current date, hour, minute, second and millisecond. The millisecond part can exceed 1,000 in order to represent the leap second. The offset in the current date is preserved.

Returns None on invalid hour, minute, second and/or millisecond.

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pub fn and_hms_micro( &self, hour: u32, min: u32, sec: u32, micro: u32 ) -> DateTime<Tz>

Makes a new DateTime from the current date, hour, minute, second and microsecond. The microsecond part can exceed 1,000,000 in order to represent the leap second. The offset in the current date is preserved.

Panics on invalid hour, minute, second and/or microsecond.

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pub fn and_hms_micro_opt( &self, hour: u32, min: u32, sec: u32, micro: u32 ) -> Option<DateTime<Tz>>

Makes a new DateTime from the current date, hour, minute, second and microsecond. The microsecond part can exceed 1,000,000 in order to represent the leap second. The offset in the current date is preserved.

Returns None on invalid hour, minute, second and/or microsecond.

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pub fn and_hms_nano( &self, hour: u32, min: u32, sec: u32, nano: u32 ) -> DateTime<Tz>

Makes a new DateTime from the current date, hour, minute, second and nanosecond. The nanosecond part can exceed 1,000,000,000 in order to represent the leap second. The offset in the current date is preserved.

Panics on invalid hour, minute, second and/or nanosecond.

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pub fn and_hms_nano_opt( &self, hour: u32, min: u32, sec: u32, nano: u32 ) -> Option<DateTime<Tz>>

Makes a new DateTime from the current date, hour, minute, second and nanosecond. The nanosecond part can exceed 1,000,000,000 in order to represent the leap second. The offset in the current date is preserved.

Returns None on invalid hour, minute, second and/or nanosecond.

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pub fn succ(&self) -> Date<Tz>

Makes a new Date for the next date.

Panics when self is the last representable date.

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pub fn succ_opt(&self) -> Option<Date<Tz>>

Makes a new Date for the next date.

Returns None when self is the last representable date.

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pub fn pred(&self) -> Date<Tz>

Makes a new Date for the prior date.

Panics when self is the first representable date.

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pub fn pred_opt(&self) -> Option<Date<Tz>>

Makes a new Date for the prior date.

Returns None when self is the first representable date.

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pub fn offset(&self) -> &Tz::Offset

Retrieves an associated offset from UTC.

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pub fn timezone(&self) -> Tz

Retrieves an associated time zone.

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pub fn with_timezone<Tz2: TimeZone>(&self, tz: &Tz2) -> Date<Tz2>

Changes the associated time zone. This does not change the actual Date (but will change the string representation).

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pub fn checked_add_signed(self, rhs: OldDuration) -> Option<Date<Tz>>

Adds given Duration to the current date.

Returns None when it will result in overflow.

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pub fn checked_sub_signed(self, rhs: OldDuration) -> Option<Date<Tz>>

Subtracts given Duration from the current date.

Returns None when it will result in overflow.

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pub fn signed_duration_since<Tz2: TimeZone>(self, rhs: Date<Tz2>) -> OldDuration

Subtracts another Date from the current date. Returns a Duration of integral numbers.

This does not overflow or underflow at all, as all possible output fits in the range of Duration.

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pub fn naive_utc(&self) -> NaiveDate

Returns a view to the naive UTC date.

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pub fn naive_local(&self) -> NaiveDate

Returns a view to the naive local date.

This is technically the same as naive_utc because the offset is restricted to never exceed one day, but provided for the consistency.

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impl<Tz: TimeZone> Date<Tz>where Tz::Offset: Display,

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pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I>where I: Iterator<Item = B> + Clone, B: Borrow<Item<'a>>,

Formats the date with the specified formatting items.

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pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat<StrftimeItems<'a>>

Formats the date with the specified format string. See the format::strftime module on the supported escape sequences.

Trait Implementations§

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impl<Tz: TimeZone> Add<Duration> for Date<Tz>

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type Output = Date<Tz>

The resulting type after applying the + operator.
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fn add(self, rhs: OldDuration) -> Date<Tz>

Performs the + operation. Read more
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impl<Tz: Clone + TimeZone> Clone for Date<Tz>where Tz::Offset: Clone,

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fn clone(&self) -> Date<Tz>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<Tz: TimeZone> Datelike for Date<Tz>

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fn year(&self) -> i32

Returns the year number in the calendar date.
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fn month(&self) -> u32

Returns the month number starting from 1. Read more
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fn month0(&self) -> u32

Returns the month number starting from 0. Read more
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fn day(&self) -> u32

Returns the day of month starting from 1. Read more
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fn day0(&self) -> u32

Returns the day of month starting from 0. Read more
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fn ordinal(&self) -> u32

Returns the day of year starting from 1. Read more
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fn ordinal0(&self) -> u32

Returns the day of year starting from 0. Read more
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fn weekday(&self) -> Weekday

Returns the day of week.
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fn iso_week(&self) -> IsoWeek

Returns the ISO week.
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fn with_year(&self, year: i32) -> Option<Date<Tz>>

Makes a new value with the year number changed. Read more
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fn with_month(&self, month: u32) -> Option<Date<Tz>>

Makes a new value with the month number (starting from 1) changed. Read more
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fn with_month0(&self, month0: u32) -> Option<Date<Tz>>

Makes a new value with the month number (starting from 0) changed. Read more
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fn with_day(&self, day: u32) -> Option<Date<Tz>>

Makes a new value with the day of month (starting from 1) changed. Read more
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fn with_day0(&self, day0: u32) -> Option<Date<Tz>>

Makes a new value with the day of month (starting from 0) changed. Read more
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fn with_ordinal(&self, ordinal: u32) -> Option<Date<Tz>>

Makes a new value with the day of year (starting from 1) changed. Read more
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fn with_ordinal0(&self, ordinal0: u32) -> Option<Date<Tz>>

Makes a new value with the day of year (starting from 0) changed. Read more
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fn year_ce(&self) -> (bool, u32)

Returns the absolute year number starting from 1 with a boolean flag, which is false when the year predates the epoch (BCE/BC) and true otherwise (CE/AD).
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fn num_days_from_ce(&self) -> i32

Counts the days in the proleptic Gregorian calendar, with January 1, Year 1 (CE) as day 1. Read more
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impl<Tz: TimeZone> Debug for Date<Tz>

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

Formats the value using the given formatter. Read more
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impl<Tz: TimeZone> Display for Date<Tz>where Tz::Offset: Display,

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

Formats the value using the given formatter. Read more
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impl<Tz: TimeZone> Hash for Date<Tz>

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<Tz: TimeZone> Ord for Date<Tz>

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fn cmp(&self, other: &Date<Tz>) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl<Tz: TimeZone, Tz2: TimeZone> PartialEq<Date<Tz2>> for Date<Tz>

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fn eq(&self, other: &Date<Tz2>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<Tz: TimeZone> PartialOrd<Date<Tz>> for Date<Tz>

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<Tz: TimeZone> Sub<Date<Tz>> for Date<Tz>

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type Output = Duration

The resulting type after applying the - operator.
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fn sub(self, rhs: Date<Tz>) -> OldDuration

Performs the - operation. Read more
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impl<Tz: TimeZone> Sub<Duration> for Date<Tz>

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type Output = Date<Tz>

The resulting type after applying the - operator.
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fn sub(self, rhs: OldDuration) -> Date<Tz>

Performs the - operation. Read more
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impl<Tz: TimeZone> Copy for Date<Tz>where <Tz as TimeZone>::Offset: Copy,

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impl<Tz: TimeZone> Eq for Date<Tz>

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impl<Tz: TimeZone> Send for Date<Tz>where <Tz as TimeZone>::Offset: Send,

Auto Trait Implementations§

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impl<Tz> RefUnwindSafe for Date<Tz>where <Tz as TimeZone>::Offset: RefUnwindSafe,

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impl<Tz> Sync for Date<Tz>where <Tz as TimeZone>::Offset: Sync,

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impl<Tz> Unpin for Date<Tz>where <Tz as TimeZone>::Offset: Unpin,

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impl<Tz> UnwindSafe for Date<Tz>where <Tz as TimeZone>::Offset: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.