calendra 6.1.2

Overview

Calendra is a Python module that offers classes able to handle calendars, list legal / religious holidays and gives working-day-related computation functions.

History

Calendra is a fork of Workalendar designed to be more extensible and introspectable, adding interfaces where Workalendar is philosophically opposed for the sake of simplicity.

What can Calendra do that Workalendar cannot?

• Provides descriptions for holidays for the “day indicated” for each Holiday (such as ‘3rd Monday in August’).

• Keeps distinct the indicated and observed dates for Holidays, such that it’s possible to determine on what day a given holiday is observed.

• Allows the number of Holidays in a calendar year to be counted.

• Consolidates observance logic in the core code rather than requiring each calendar implementation to implement its own.

Status

The project is stable and in production use. Calendra follows the principles of semver for released verisons.

If you spot any bug or wish to add a calendar, please refer to the Contributing doc.

Usage sample

>>> from datetime import date
>>> from calendra.europe import France
>>> cal = France()
>>> cal.holidays(2012)
[(datetime.date(2012, 1, 1), 'New year'),
 (datetime.date(2012, 4, 9), 'Easter Monday'),
 (datetime.date(2012, 5, 1), 'Labour Day'),
 (datetime.date(2012, 5, 8), 'Victory in Europe Day'),
 (datetime.date(2012, 5, 17), 'Ascension Day'),
 (datetime.date(2012, 5, 28), 'Whit Monday'),
 (datetime.date(2012, 7, 14), 'Bastille Day'),
 (datetime.date(2012, 8, 15), 'Assumption of Mary to Heaven'),
 (datetime.date(2012, 11, 1), "All Saints' Day"),
 (datetime.date(2012, 11, 11), 'Armistice Day'),
 (datetime.date(2012, 12, 25), 'Christmas')]
>>> cal.is_working_day(date(2012, 12, 25))  # it's Christmas
False
>>> cal.is_working_day(date(2012, 12, 30))  # it's Sunday
False
>>> cal.is_working_day(date(2012, 12, 26))
True
>>> cal.add_working_days(date(2012, 12, 23), 5)  # 5 working days after Xmas
datetime.date(2012, 12, 31)

For a more complete documentation and advanced usage, go to the official workalendar documentation.

External dependencies

Calendra has been tested on the Python versions declared in setup.cfg.

If you’re using wheels, you should be fine without having to install extra system packages. As of v7.0.0, we have dropped ephem as a dependency for computing astronomical ephemeris in favor of skyfield. So if you had any trouble because of this new dependency, during the installation or at runtime, do not hesitate to file an issue.

Tests

Travis status:

To run test, just install tox with pip install tox and run:

tox

from the command line.

Available Calendars

Caveats

Please take note that some calendars are not 100% accurate. The most common example is the Islamic calendar, where some computed holidays are not exactly on the same official day decided by religious authorities, and this may vary country by country. Whenever it’s possible, try to adjust your results with the official data provided by the adequate authorities.

Contributing

Please read our CONTRIBUTING.rst document to discover how you can contribute to calendra. Pull-requests are very welcome.

License

This library is published under the terms of the MIT License. Please check the LICENSE file for more details.