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Description:

calendra 7.9.0

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.
Tests
To run test, just install tox with pip install tox and run tox
from the command line.
Available Calendars
Europe

Austria
Belarus
Belgium
Bulgaria
Cayman Islands
Croatia
Cyprus
Czech Republic
Denmark
Estonia
European Central Bank
Finland
France
France (Alsace / Moselle)
Georgia
Germany
Greece
Guernsey
Hungary
Iceland
Ireland
Italy
Latvia
Lithuania
Luxembourg
Malta
Monaco
Netherlands (optionally with school holidays and carnival)
Norway
Poland
Portugal
Romania
Russia
Serbia
Slovakia
Slovenia
Spain (Andalusia, Aragon, Castile and León, Castilla-La Mancha, Canary Islands, Extremadura, Galicia, Balearic Islands, La Rioja, Community of Madrid, Murcia, Navarre, Asturias, Basque Country, Cantabria, Valencian Community)
Sweden
Switzerland (Aargau, Appenzell Innerrhoden, Appenzell Ausserrhoden, Bern, Basel-Landschaft, Basel-Stadt, Fribourg, Geneva, Glarus, Graubünden, Jura, Luzern, Neuchâtel, Nidwalden, Obwalden, St. Gallen, Schaffhausen, Solothurn, Schwyz, Thurgau, Ticino, Uri, Vaud, Valais, Zug, Zurich)
Turkey
Ukraine
United Kingdom (incl. Northern Ireland, Scotland and all its territories)

America

Argentina
Barbados
Brazil (all states, cities and for bank transactions, except the city of Viana)
Canada (including provincial and territory holidays)
Chile
Colombia
El Salvador
Mexico
Panama
Paraguay
United States of America

State holidays for all the 50 States
American Samoa
Chicago, Illinois
Guam
Suffolk County, Massachusetts
California Education, Berkeley, San Francisco, West Hollywood
Florida Legal and Florida Circuit Courts, Miami-Dade
Federal Reserve System

Asia

China
Hong Kong
Israel
Japan
JapanBank
Kazakhstan
Malaysia
Philippines
Qatar
Singapore
South Korea
Taiwan

Oceania

Australia (incl. its different states)
Marshall Islands
New Zealand

Africa

Algeria
Angola
Benin
Ivory Coast
Kenya
Madagascar
Mozambique
Nigeria
São Tomé
South Africa
Tunisia

And more to come (I hope!)
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.
Some countries have some holidays based on ephemerids and equinoxes. Those are computed for the previous and next 30 years to prevent big computations and dependencies.
Contributing
Please read our contributing.md document to discover how you can contribute to workalendar. Pull-requests are very welcome.
History
This project was born in 2013, as an answer to the question "how do we calculate this date + 5 working days?". It was a use-case for PeopleDoc, in their ticketing application, for calculating SLAs. And it began as a small open-source library, for France and the USA at first.
Thanks to PeopleDoc, this project grew and eventually became a world-wide library, with the help of dozens of contributors.
As of June 2021, this project has moved to its own organization.
License
This library is published under the terms of the MIT License. Please check the LICENSE file for more details.