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pganssle merged 6 commits into from
May 16, 2020
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bpo-40503: Add documentation and what's new entry for zoneinfo #20006

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Add documentation for zoneinfo module
pganssle May 4, 2020
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Add What's New entry for zoneinfo
pganssle May 8, 2020
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Add news entry
pganssle May 8, 2020
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pganssle May 16, 2020
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Add documentation for TZPATH compile option
pganssle May 16, 2020
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Update Misc/NEWS.d/next/Library/2020-05-08-15-48-39.bpo-40503.elZyxc.rst
pganssle May 16, 2020
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Add What's New entry for zoneinfo
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@pganssle
pganssle committed May 16, 2020
commit 77e039681ea03d7ffafcf4a93d261da7e1ba113f
41 changes: 40 additions & 1 deletion Doc/whatsnew/3.9.rst
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Expand Up @@ -205,7 +205,46 @@ Other Language Changes
New Modules
===========

* None yet.
.. _whatsnew39-pep615:
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zoneinfo
--------

The :mod:`zoneinfo` module brings support for the IANA time zone database to
the standard library. It adds :class:`zoneinfo.ZoneInfo`, a concrete
:class:`datetime.tzinfo` implementation backed by the system's time zone data.

Example::

>>> from zoneinfo import ZoneInfo
>>> from datetime import datetime, timedelta

>>> # Daylight saving time
>>> dt = datetime(2020, 10, 31, 12, tzinfo=ZoneInfo("America/Los_Angeles"))
>>> print(dt)
2020-10-31 12:00:00-07:00
>>> dt.tzname()
'PDT'

>>> # Standard time
>>> dt += timedelta(days=7)
>>> print(dt)
2020-11-07 12:00:00-08:00
>>> print(dt.tzname())
PST


As a fall-back source of data for platforms that don't ship the IANA database,
the |tzdata|_ module was released as a first-party package -- distributed via
PyPI and maintained by the CPython core team.

.. |tzdata| replace:: ``tzdata``
.. _tzdata: https://pypi.org/project/tzdata/

.. seealso::

:pep:`615` -- Support for the IANA Time Zone Database in the Standard Library
PEP written and implemented by Paul Ganssle


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