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Zope datetime

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Latest release Supported Python versions CI status Coverage Documentation Status

Functions to parse and format date/time strings in common formats.

The documentation is hosted at


5.0.0 (2023-04-25)

  • Drop support for Python 2.7, 3.5, 3.6.

  • Add support for Python 3.10, 3.11.

4.3.0 (2021-02-26)

  • Drop support for Python 3.4.

  • Add support for Python 3.7, 3.8 and 3.9.

  • Prevent a DeprecationWarning in Python 3.8+ when using a parameter for iso8601_date, rfc850_date, or rfc1123_date which has to be converted via its __int__ method.

4.2.0 (2017-08-14)

  • Remove support for guessing the timezone name when a timestamp exceeds the value supported by Python’s localtime function. On platforms with a 32-bit time_t, this would involve parsed values that do not specify a timezone and are past the year 2038. Now the underlying exception will be propagated. Previously an undocumented heuristic was used. This is not expected to be a common issue; Windows, as one example, always uses a 64-bit time_t, even on 32-bit platforms. See

  • Use true division on Python 2 to match Python 3, in case certain parameters turn out to be integers instead of floating point values. This is not expected to be user-visible, but it can arise in artificial tests of internal functions.

  • Add support for Python 3.5 and 3.6.

  • Drop support for Python 2.6, 3.2 and 3.3.

4.1.0 (2014-12-26)

  • Add support for PyPy and PyPy3.

  • Add support for Python 3.4.

  • Add support for testing on Travis.

4.0.0 (2013-02-19)

  • Add support for Python 3.2 and 3.3.

  • Drop support for Python 2.4 and 2.5.

3.4.1 (2011-11-29)

  • Add test cases from LP #139360 (all passed without modification to the parse function).

  • Remove unneeded zope.testing dependency.

3.4.0 (2007-07-20)

  • Initial release as a separate project.

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