Crate time

Feature flags

This crate exposes a number of features. These can be enabled or disabled as shown in Cargo’s documentation. Features are disabled by default unless otherwise noted.

Reliance on a given feature is always indicated alongside the item definition.

• std (enabled by default)

  This enables a number of features that depend on the standard library. Instant is the primary item that requires this feature, though some others methods may rely on Instant internally.

  This crate currently requires a global allocator be present even if this feature is disabled.

• serde

  Enables serde support for all types.

• rand

  Enables rand support for all types.

• deprecated (enabled by default)

  Allows using certain deprecated functions from time 0.1.

• panicking-api

  Non-panicking APIs are provided, and should generally be preferred. However, there are some situations where avoiding .unwrap() may be desired. Generally speaking, macros should be used in these situations. Library authors should avoid using this feature.

Formatting

Time’s formatting behavior is based on strftime in C, though it is explicitly not compatible. Specifiers may be missing, added, or have different behavior than in C. As such, you should use the table below, which is an up-to-date reference on what each specifier does.

Specifiers

Specifier	Replaced by	Example
%a	Abbreviated weekday name	Thu
%A	Full weekday name	Thursday
%b	Abbreviated month name	Aug
%B	Full month name	August
%c	Date and time representation, equivalent to %a %b %-d %-H:%M:%S %-Y	Thu Aug 23 14:55:02 2001
%C	Year divided by 100 and truncated to integer (00-99)	20
%d	Day of the month, zero-padded (01-31)	23
%D	Short MM/DD/YY date, equivalent to %-m/%d/%y	8/23/01
%F	Short YYYY-MM-DD date, equivalent to %-Y-%m-%d	2001-08-23
%g	Week-based year, last two digits (00-99)	01
%G	Week-based year	2001
%H	Hour in 24h format (00-23)	14
%I	Hour in 12h format (01-12)	02
%j	Day of the year (001-366)	235
%m	Month as a decimal number (01-12)	08
%M	Minute (00-59)	55
%N	Subsecond nanoseconds. Always 9 digits	012345678
%p	am or pm designation	pm
%P	AM or PM designation	PM
%r	12-hour clock time, equivalent to %-I:%M:%S %p	2:55:02 pm
%R	24-hour HH:MM time, equivalent to %-H:%M	14:55
%S	Second (00-59)	02
%T	24-hour clock time with seconds, equivalent to %-H:%M:%S	14:55:02
%u	ISO 8601 weekday as number with Monday as 1 (1-7)	4
%U	Week number with the first Sunday as the start of week one (00-53)	33
%V	ISO 8601 week number (01-53)	34
%w	Weekday as a decimal number with Sunday as 0 (0-6)	4
%W	Week number with the first Monday as the start of week one (00-53)	34
%y	Year, last two digits (00-99)	01
%Y	Full year, including + if ≥10,000	2001
%z	ISO 8601 offset from UTC in timezone (+HHMM)	+0100
%%	Literal %	%

Modifiers

All specifiers that are strictly numerical have modifiers for formatting. Adding a modifier to a non-supporting specifier is a no-op.

Modifier	Behavior	Example
- (dash)	No padding	%-d => 5
_ (underscore)	Pad with spaces	%_d => 5
0	Pad with zeros	%0d => 05

Re-exports

pub use error::Error;

pub use error::ComponentRange as ComponentRangeError;

pub use error::ConversionRange as ConversionRangeError;

pub use error::IndeterminateOffset as IndeterminateOffsetError;

pub use ext::NumericalDuration;

pub use ext::NumericalStdDuration;

pub use ext::NumericalStdDurationShort;

pub use util::days_in_year;

pub use util::is_leap_year;

pub use util::validate_format_string;

pub use util::weeks_in_year;

Modules

error	Various error types returned by methods in the time crate.
ext	Extension traits.
macros	Macros to statically construct values that are known to be valid.
prelude	A collection of imports that are widely useful.
util	Utility functions.

Macros

date
offset
time

Structs

Date	Calendar date.
Duration	A span of time with nanosecond precision.
Instant	A measurement of a monotonically non-decreasing clock. Opaque and useful only with Duration.
OffsetDateTime	A PrimitiveDateTime with a UtcOffset.
PrimitiveDateTime	Combined date and time.
Time	The clock time within a given date. Nanosecond precision.
UtcOffset	An offset from UTC.

Enums

Format	Various well-known formats, along with the possibility for a custom format (provided either at compile-time or runtime).
ParseError	An error occurred while parsing.
Sign	Deprecated Contains the sign of a value: positive, negative, or zero.
Weekday	Days of the week.

Functions

parse	Parse any parsable type from the time crate.
precise_time_ns	Deprecated
precise_time_s	Deprecated

Type Definitions

PreciseTime	Deprecated
Result	An alias for Result with a generic error from the time crate.
SteadyTime	Deprecated