# chronotope/chrono

Date and time library for Rust

Repository: https://github.com/chronotope/chrono
Canonical: https://ross.abutalabs.com/products/chronotope-chrono
Language: Rust
License: NOASSERTION
License Family: other
Topics: rust, date, time, calendar
Last push: 2026-08-03T10:26:58+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 95, release rhythm 75, longevity 100
- inputs: {"age_days": 4541, "days_push": 30, "days_rel": 90, "gap_med": 89.5, "n_releases_24m": 7}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3900, forks 610 (observed 2026-08-28T04:08:28.572585+00:00)

## What it is
Chrono is a date and time library for Rust providing timezone-aware DateTime types, timezone-naive variants, and strftime-style parsing and formatting. It focuses on correct operations in the proleptic Gregorian calendar with configurable feature flags for minimal binary size.

## Use cases
- parse and format dates in rust
- handle timezones correctly in rust
- get current system time and local timezone
- convert between utc and local time
- parse timestamps from strings
- do date arithmetic like adding days or months

## When to choose
- you need correct, timezone-aware date and time handling in Rust
- you want mature, widely used date/time crate with huge ecosystem adoption
- you need configurable features to keep binaries small

## When to avoid
- you need non-Gregorian calendars
- you need full leap second support
- you need bundled timezone data without a companion crate

## Facets
- artifact type: library
- maturity: stable
- function: date-time
- domain: developer-tools, cross-platform
- platform: rust, cross-platform, wasm
- tags: calendar, timezone, strftime-parsing, no-std-friendly

## Member repositories
- chronotope/chrono (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:28.572585+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:25:11.470741+00:00, confidence not recorded.
  - readme: https://github.com/chronotope/chrono (fetched 2026-08-28T04:08:28.572585+00:00, sha 37546c926e53)
  - registry_crates: https://crates.io/api/v1/crates/chrono (fetched 2026-08-29T09:19:18.080091+00:00, sha 37c770a9539b)
- Data as of 2026-08-30T08:39:29.467469+00:00.