# dateutil/dateutil

Useful extensions to the standard Python datetime features

Repository: https://github.com/dateutil/dateutil
Canonical: https://ross.abutalabs.com/products/dateutil
Language: Python
License: NOASSERTION
License Family: other
Topics: python, datetime, time, timezones, parsing, library
Last push: 2026-05-19T23:50:16+00:00

## Health v2 (maintenance only)
Score: 60/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 83, release rhythm 8, longevity 100
- inputs: {"age_days": 4305, "days_push": 106, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- 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 2631, forks 571 (observed 2026-08-28T04:07:06.111473+00:00)

## What it is
python-dateutil is a Python library providing powerful extensions to the standard datetime module. It offers flexible date parsing, relative delta computation, iCalendar-based recurrence rules, and timezone implementations.

## Use cases
- parse dates from arbitrary string formats in python
- compute the next monday or last day of the month
- generate recurring event dates from iCalendar RRULE strings
- handle timezone conversions with zoneinfo files
- calculate the difference between two datetimes in relative terms

## When to choose
- you need to parse dates in unknown or varied string formats
- you need flexible recurrence rule handling beyond the standard library
- you need robust timezone support including tzfile and TZ environment strings

## When to avoid
- you only need simple, fixed-format date handling covered by the standard library
- you need high-performance bulk date parsing with minimal dependencies

## Facets
- artifact type: library
- maturity: stable
- function: date-time, parser
- domain: developer-tools
- platform: python, cross-platform
- tags: datetime, timezones, recurrence-rules, icalendar, date-parsing, algorithms

## Member repositories
- dateutil/dateutil (main) score 60

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:06.111473+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 2026-08-30T02:19:37.417001+00:00, confidence not recorded.
  - readme: https://github.com/dateutil/dateutil (fetched 2026-08-28T04:07:06.111473+00:00, sha de92c1ea83f6)
- Data as of 2026-08-30T08:39:29.467469+00:00.