Struct Date 

pub struct Date { /* private fields */ }

A calendar date.

Implementations

impl Date

pub fn calendar(&self) -> Calendar

Returns the calendar system of this date.

pub fn year(&self) -> i64

Returns the year.

pub fn month(&self) -> u8

Returns the month (1–12).

pub fn day(&self) -> u8

Returns the day of the month (1–31).

pub fn new(year: i64, month: u8, day: u8) -> Result<Date, DateError>

Construct a new Date from a year, month and day. The Calendar is inferred from the input fields.

Errors

• DateError::InvalidDate if the input fields do not represent a valid date.

pub const fn new_unchecked(year: i64, month: u8, day: u8) -> Date

Constructs a new Date without validation. The Calendar is inferred.

pub fn from_iso(iso: &str) -> Result<Date, DateError>

Constructs a new Date from an ISO 8601 string.

Errors

• DateError::InvalidIsoString if the input string does not contain a valid ISO 8601 date.
• DateError::InvalidDate if the date parsed from the ISO 8601 string is invalid.

pub fn from_days_since_j2000(days: i64) -> Date

Constructs a new Date from a signed number of days since J2000. The Calendar is inferred.

pub fn from_seconds_since_j2000(seconds: i64) -> Date

Constructs a new Date from a signed number of seconds since J2000. The Calendar is inferred.

pub fn from_day_of_year(year: i64, day_of_year: u16) -> Result<Date, DateError>

Constructs a new Date from a year and a day number within that year. The Calendar is inferred.

Errors

• DateError::NonLeapYear if the input day number is 366 and the year is not a leap year.

pub const fn j2000_day_number(&self) -> i64

Returns the day number of self relative to J2000.

pub const fn to_delta(&self) -> TimeDelta

Converts this date to a TimeDelta relative to J2000.

Trait Implementations

impl Clone for Date

fn clone(&self) -> Date

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Date

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

Formats the value using the given formatter.

impl Default for Date

fn default() -> Date

Date defaults to 2000-01-01 of the Gregorian calendar.

impl Display for Date

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

Formats the value using the given formatter.

impl FromStr for Date

type Err = DateError

The associated error which can be returned from parsing.

fn from_str(iso: &str) -> Result<Date, <Date as FromStr>::Err>

Parses a string s to return a value of this type.

impl JulianDate for Date

fn julian_date(&self, epoch: Epoch, unit: Unit) -> f64

Expresses self as a Julian date in the specified Unit, relative to the given Epoch.

fn two_part_julian_date(&self) -> (f64, f64)

Expresses self as a two-part Julian date in the specified Unit, relative to the given Epoch.

fn seconds_since_julian_epoch(&self) -> f64

Returns the number of seconds since the Julian epoch as an f64.

fn seconds_since_modified_julian_epoch(&self) -> f64

Returns the number of seconds since the Modified Julian epoch as an f64.

fn seconds_since_j1950(&self) -> f64

Returns the number of seconds since J1950 as an f64.

fn seconds_since_j2000(&self) -> f64

Returns the number of seconds since J2000 as an f64.

fn days_since_julian_epoch(&self) -> f64

Returns the number of days since the Julian epoch as an f64.

fn days_since_modified_julian_epoch(&self) -> f64

Returns the number of days since the Modified Julian epoch as an f64.

fn days_since_j1950(&self) -> f64

Returns the number of days since J1950 as an f64.

fn days_since_j2000(&self) -> f64

Returns the number of days since J2000 as an f64.

fn years_since_julian_epoch(&self) -> f64

Returns the number of years since the Julian epoch as an f64.

fn years_since_modified_julian_epoch(&self) -> f64

Returns the number of years since the Modified Julian epoch as an f64.

fn years_since_j1950(&self) -> f64

Returns the number of years since J1950 as an f64.

fn years_since_j2000(&self) -> f64

Returns the number of years since J2000 as an f64.

fn centuries_since_julian_epoch(&self) -> f64

Returns the number of centuries since the Julian epoch as an f64.

fn centuries_since_modified_julian_epoch(&self) -> f64

Returns the number of centuries since the Modified Julian epoch as an f64.

fn centuries_since_j1950(&self) -> f64

Returns the number of centuries since J1950 as an f64.

fn centuries_since_j2000(&self) -> f64

Returns the number of centuries since J2000 as an f64.

impl Ord for Date

fn cmp(&self, other: &Date) -> 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 for Date

fn eq(&self, other: &Date) -> 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 for Date

fn partial_cmp(&self, other: &Date) -> 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 Copy for Date

impl Eq for Date

impl StructuralPartialEq for Date