A place for pydantic types that probably shouldn't exist in the main pydantic lib.
See pydantic/pydantic#5012 for more info.
Install this library with the desired extras dependencies as listed in project.optional-dependencies.
For example, if pendulum support was desired:
# via uv
$ uv add "pydantic-extra-types[pendulum]"
# via pip
$ pip install -U "pydantic-extra-types[pendulum]"