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chrono

v0.4.44 Growing

Date and time library for Rust

MIT OR Apache-2.0 Edition 2021 MSRV 1.62.0
Date and time #time#date#calendar

Quick Verdict

  • โœ“Actively maintained (updated 32d ago)
  • !Pre-1.0: API may have breaking changes
  • โœ“Massive adoption (278.0K crates depend on it)
  • โœ“Team maintained (2 owners)
  • โœ“Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...
Downloads
516.3M
Dependents
278.0K
Releases
94
Size
241KB

Deep Insights

๐Ÿ“Š
Steady growth

37.7M downloads in the last 30 days (1.3M/day), up 19% from the previous period.

๐Ÿ›๏ธ
Foundational crate

278.0K crates depend on chrono โ€” it's part of the Rust ecosystem's core infrastructure. Removing it from your dependency tree would be extremely difficult.

๐Ÿ‘ฅ
Team maintained

This crate is maintained by a team (2 owners), reducing bus-factor risk and ensuring continuity.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 11+ years old, chrono hasn't reached 1.0 yet. Expect potential API changes between versions.

โš ๏ธ
Notable yanked versions

23% of releases have been yanked. Check version history before pinning.

๐ŸŒŸ
Used by top crates

Notable dependents include tracing-subscriber, humantime, prost-types, serde_with, foldhash. When high-quality crates choose chrono, it's a strong quality signal.

Health Breakdown

Maintenance 17/25

Recency, release consistency, active ratio

Quality 10/25

Yanked ratio, deps, size, maturity, features

Community 19/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 15/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
1.0M/day avg+60%
0500K1.0M1.5M12/291/162/32/213/113/28

Top Dependents

Version Adoption

v0.4.38
26%
v0.4.41
23%
v0.4.42
22%
v0.4.19
18%
v0.4.40
11%

Release Timeline

94 releases22 yankedsince 2014
J
F
M
A
M
J
J
A
S
O
N
D
2014
7
2015
30
2016
8
2017
3
2018
6
2019
4
2020
9
2021
2022
6
2023
8
2024
8
2025
3
2026
2
Less
More|
Yanked

Feature Flags

default =["clock", "std", "oldtime", "wasmbind"]

nowstd*libcrkyvallocclock*defmtwinapioldtime*rkyv-16rkyv-32rkyv-64wasmbind*core-errorrkyv-validation__internal_benchunstable-locales

README

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Maintainers

Dependencies
16
direct dependencies
Dependents
278.0K
crates depend on chrono

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