Crate fasttime 

fasttime — small UTC date/time library built around Ben Joffe’s fast 64-bit days→date algorithm.

Features:

• no_std compatible (only core; std is optional).
• Date / Time / DateTime (UTC).
• Duration with nanosecond precision.
• UtcOffset and OffsetDateTime (fixed offset, RFC 3339-style).
• ISO-like formatting via Display.
• Parsing of:
  • Date: “YYYY-MM-DD”
  • Time: “HH:MM:SS[.fffffffff]”
  • DateTime (UTC): “YYYY-MM-DDTHH:MM:SS[.fffffffff]Z”
  • OffsetDateTime: “YYYY-MM-DDTHH:MM:SS[.fffffffff][Z|±HH:MM]” (RFC 3339 subset).
• DateTime::now_utc() when the std feature is enabled.

Python Bindings

When built with the python feature, this crate provides Python bindings via PyO3. See the python/ directory for examples and documentation.

Structs

Date

Gregorian calendar date (proleptic).

DateTime

Combined UTC date and time (no time zone).

Duration

Signed duration with nanosecond precision.

OffsetDateTime

Date-time with a fixed offset from UTC (RFC 3339-style).

Time

Time of day in nanoseconds since midnight.

UtcOffset

Fixed offset from UTC, in seconds (e.g. +02:00).

Enums

DateError

Errors constructing or parsing a Date.

Rfc3339OffsetError

Errors parsing an RFC 3339 UTC offset.

TimeError

Errors constructing or parsing a Time.

UtcOffsetError

Error constructing a UTC offset.

Weekday

Calendar weekday (ISO order, Monday = 1).

Functions

parse_rfc3339_offset