Sourced from time-machine's changelog.

2.18.0 (2025-08-18)

• Update the :ref:migration CLI <migration-cli> to detect unittest classes based on whether they use self.assert* methods like self.assertEqual().

• Fix free-threaded Python warning: RuntimeWarning: The global interpreter lock (GIL) has been enabled... as seen on Python 3.13+.

  Thanks to Javier Buzzi in PR [#531](https://github.com/adamchainz/time-machine/issues/531) <https://github.com/adamchainz/time-machine/pull/531>__.

• Add support to travel() for datetime destinations with tzinfo set to datetime.UTC (datetime.timezone.utc).

  Thanks to Lawrence Law in PR [#502](https://github.com/adamchainz/time-machine/issues/502) <https://github.com/adamchainz/time-machine/pull/502>__.

• Prevent segmentation faults in unlikely scenarios, such as if the time_machine module cannot be imported.

  PR [#543](https://github.com/adamchainz/time-machine/issues/543) <https://github.com/adamchainz/time-machine/pull/543>, PR [#545](https://github.com/adamchainz/time-machine/issues/545) <https://github.com/adamchainz/time-machine/pull/545>.

• Make travel() fully unpatch date and time functions when travel ends. This may fix certain edge cases.

  Issue [#532](https://github.com/adamchainz/time-machine/issues/532) <https://github.com/adamchainz/time-machine/issues/532>__.

2.17.0 (2025-08-05)

• Include wheels for Python 3.14.

  Thanks to Edgar Ramírez Mondragón in PR [#521](https://github.com/adamchainz/time-machine/issues/521) <https://github.com/adamchainz/time-machine/pull/521>__.

• Support free-threaded Python.

  Thanks to Javier Buzzi in PR [#500](https://github.com/adamchainz/time-machine/issues/500) <https://github.com/adamchainz/time-machine/pull/500>__.

• Add a new CLI for migrating code from freezegun to time-machine.

  Install with pip install time-machine[cli] and run with python -m time_machine migrate.

  See more :ref:in the documentation <migration-cli>.

• Move the documentation to Read the Docs <https://time-machine.readthedocs.io/>__, and add a retro-futuristic logo.

2.16.0 (2024-10-08)

• Drop Python 3.8 support.

• 728d0a6 Version 2.18.0
• 65a214c Import date/time modules once in C extension (#553)
• 9ff207b Unpatch functions when travel ends (#550)
• 6e7e3c3 Use Sphinx autodoc (#547)
• f48ff0a Add support for datetime destinations with tzinfo=datetime.UTC (#502)
• babef2c Revert "Enable more compiler warnings and fix results (#546)"
• 9bd0dde Enable more compiler warnings and fix results (#546)
• c45ad79 Propagate errors from more C functions (#545)
• b4f50ed Upgrade dependencies (#544)
• 592668a Propagate errors from 'original' C functions (#543)
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