Simple module to parse ISO 8601 dates

pip install iso8601

Documentation: https://pyiso8601.readthedocs.org/

PyPI: https://pypi.org/project/iso8601/

Source: https://github.com/micktwomey/pyiso8601

This module parses the most common forms of ISO 8601 date strings (e.g. 2007-01-14T20:34:22+00:00) into datetime objects.

import iso8601 iso8601.parse_date("2007-01-25T12:00:00Z") datetime.datetime(2007, 1, 25, 12, 0, tzinfo=<iso8601.Utc>)

See the LICENSE file for the license this package is released under.

If you want more full featured parsing look at:

• https://arrow.readthedocs.io - arrow
• https://pendulum.eustace.io - pendulum
• https://labix.org/python-dateutil - python-dateutil
• https://docs.python.org/3/library/datetime.html#datetime.datetime.fromisoformat - Yes, Python 3 has built in parsing too!

Parsed Formats

You can parse full date + times, or just the date. In both cases a datetime instance is returned but with missing times defaulting to 0, and missing days / months defaulting to 1.

Dates

• YYYY-MM-DD
• YYYYMMDD
• YYYY-MM (defaults to 1 for the day)
• YYYY (defaults to 1 for month and day)

Times

• hh:mm:ss.nn
• hhmmss.nn
• hh:mm (defaults to 0 for seconds)
• hhmm (defaults to 0 for seconds)
• hh (defaults to 0 for minutes and seconds)

Time Zones

• Nothing, will use the default timezone given (which in turn defaults to UTC).
• Z (UTC)
• +/-hh:mm
• +/-hhmm
• +/-hh

Where it Differs From ISO 8601

Known differences from the ISO 8601 spec:

• You can use a " " (space) instead of T for separating date from time.
• Days and months without a leading 0 (2 vs 02) will be parsed.
• If time zone information is omitted the default time zone given is used (which in turn defaults to UTC). Use a default of None to yield naive datetime instances.

References

• https://en.wikipedia.org/wiki/ISO_8601

• https://www.cl.cam.ac.uk/~mgk25/iso-time.html - simple overview

• https://web.archive.org/web/20090309040208/http://hydracen.com/dx/iso8601.htm - more detailed enumeration of valid formats.

Testing

1. poetry install
2. poetry run nox

Note that you need all the pythons installed to perform a tox run (see below). pyenv helps hugely, use pyenv install for the versions you need then use 'pyenv local version ...' to link them in (the tox-pyenv plugin will pick them up).

Alternatively, to test only with your current python:

1. poetry install
2. pytest

Releasing

1. just prepare-release
2. just do-release

Supported Python Versions

Tested against:

• Python 3.7
• Python 3.8
• Python 3.9
• Python 3.10
• Python 3.11
• Python 3.12
• PyPy 3

Python 3 versions < 3.7 are untested but should work.

Changes

See CHANGELOG.md <https://github.com/micktwomey/pyiso8601/blob/main/CHANGELOG.md>_.