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Chore: last day of month explanation #214

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potiuk merged 1 commit into from
Mar 19, 2026
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Chore: last day of month explanation #214

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13 changes: 13 additions & 0 deletions README.rst
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Expand Up @@ -143,6 +143,19 @@ The ``strict`` and ``strict_year`` parameters are also available on ``expand()``

>>> croniter.expand('0 0 31 2 *', strict=True) # raises CroniterBadCronError

Last day of month (l)
=====================

You can use ``l`` in the day-of-month field to mean "the last day of the month". This
automatically respects the number of days in each month, including February and leap years::

>>> croniter('0 0 l * *', datetime(2024, 1, 30)).get_next(datetime)
datetime.datetime(2024, 1, 31, 0, 0)
>>> croniter('0 0 l * *', datetime(2024, 2, 1)).get_next(datetime) # leap year
datetime.datetime(2024, 2, 29, 0, 0)
>>> croniter('0 0 l * *', datetime(2023, 2, 1)).get_next(datetime) # non-leap year
datetime.datetime(2023, 2, 28, 0, 0)

Nearest weekday (W)
===================

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