rfc3339.py is a small Python library to format dates to rfc 3339 strings. Useful if you want to add an Atom feed to you site / project. Grab the file, drop it in your python source code, that's it! Licensed under the term of the ISC License a simple, permissive, BSD-like license.

Additionally, you can also install it from PyPi: pip install rfc3339 or easy_install rfc3339.

If you find any bugs or would like to see something added, feel free to open a ticket on BitBucket.

How to use it:

>>> import time
>>> timestamp = time.time()
>>> print timestamp
>>> import datetime
>>> d = datetime.datetime.fromtimestamp(timestamp)
>>> print d
2008-09-08 22:47:31.893205

>>> from rfc3339 import rfc3339

>>> rfc3339(timestamp) # Works with timestamps

>>> rfc3339(d) # And datetime & date objects

>>> rfc3339(d, utc=True) # Normalize time to UTC
>>> rfc3339(d, utc=True, use_system_timezone=False)

2010-2-5: Handle system timezone correctly. Instead of using the current daylight saving, use the the daylight saving at the time of the datetime object.

2009-12-21: Fixed a bug with daylight savings. Reported by Gary Bishop.

2010-1-26: I've changed the license from “Public domain” to the ISC License.

2011-1-4: Fixed a bug with dates before 1970.


Wow! I also made some docs! Generated via pydoc rfc3339

Help on module rfc3339:


    The function `rfc3339` formats dates according to the :RFC:`3339`. `rfc3339`
    tries to have as much as possible sensible defaults.

    rfc3339(date, utc=False, use_system_timezone=True)
        Return a string formatted according to the :RFC:`3339`. If called with
        `utc=True`, it normalizes `date` to the UTC date. If `date` does not have
        any timezone information, uses the local timezone::
            >>> date = datetime.datetime(2008, 4, 2, 20)
            >>> rfc3339(date, utc=True, use_system_timezone=False)
            >>> rfc3339(date) # doctest: +ELLIPSIS
        If called with `user_system_time=False` don't use the local timezone if
        `date` does not have timezone informations and consider the offset to UTC
        to be zero::
            >>> rfc3339(date, use_system_timezone=False)
        `date` must be a `datetime.datetime`, `datetime.date` or a timestamp as
        returned by `time.time()`::
            >>> rfc3339(0, utc=True, use_system_timezone=False)
            >>> rfc3339(datetime.date(2008, 9, 6), utc=True,
            ...         use_system_timezone=False)
            >>> rfc3339(datetime.date(2008, 9, 6),
            ...         use_system_timezone=False)
            >>> rfc3339('foo bar')
            Traceback (most recent call last):
            TypeError: excepted datetime, got str instead

    __all__ = ('rfc3339',)
    __author__ = 'Henry Precheur <henry@precheur.org>'
    __license__ = 'ISCL'
    __version__ = '3'


    Henry Precheur <henry@precheur.org>