PyRank
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ciso8601

Fast ISO8601 date time parser for Python written in C
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

ciso8601 has 11.7M monthly downloads and 577 GitHub stars. Version 2.3.3, first published in 2014.

It is actively maintained under a permissive license, last released in Aug 2025.

It is used by 101 tracked packages, including pinotdb, asynch and homeassistant.

GitHub topics include date-parser, iso8601 and c.

Downloads
Day
335.3K
Week
2.6M
Month
11.7M
Stars
577
Forks
50
Issues
15
Version
2.3.3

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
90
Popularity
55
Adoption
70
Community
50
Provenance
0
How the maintenance status was determined
Last commit
26 days ago
Monthly downloads
11,746,934
• Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
11,746,934
Stars
577
Stars per 1k downloads
0.05
• Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
365,100
Month daily avg
391,564
Momentum
-6.8%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
Not specified
Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
• Unknown
No requires_python specified or unparseable
Package does not declare a minimum Python version.
License categories
License
MIT
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
320 days ago
Total releases
20
Releases/year
1.7
Rapid
Last release within 365 days and > 12 releases/year
• Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
83
Monthly downloads
11,746,934
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
48
 
Issue Burden
26.0
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
166.0%
contrib / forks
Stale Release
294d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 265.2K
macOS 634
Windows 349

Python Versions

3.10
36.3% 83.6K
3.11
24.4% 56.1K
3.12
17.0% 39.1K
3.13
11.9% 27.5K
3.14
10.5% 24.1K

Top Countries

1. US US
227.7K
2. IE IE
32.5K
3. DE DE
5.2K
4. GB GB
3.9K
5. SG SG
3.0K
6. FR FR
2.5K
7. NL NL
2.2K
8. IN IN
1.8K
9. RU RU
1.3K
10. FI FI
1.1K
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
MIT
First Release
June 9, 2014
Last Release
10 months ago
Last Commit
3 weeks ago
Latest Version
2.3.3
Total Releases
20
Contributors
83
Open PRs
1
Archived
No
Python Versions
2 2.7 3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14
Wheels
cp310 cp311 cp312 cp313 cp314 cp36 cp37 cp38 cp39 pp310 pp311 pp37 pp38 pp39
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links