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Relative weekday/date utilities useful for finding public holidays

Project description

Relative weekday/date utilities useful for finding public holidays


pip install blackskirt

After installation is complete, try the following import statements to make sure it’s working.

from blackskirt import (WEEKDAY_MON, WEEKDAY_TUE, WEEKDAY_WED,
                        WEEKDAY_THU, WEEKDAY_FRI, WEEKDAY_SAT,
from blackskirt.ops import (mondayise, next_weekday, prev_weekday,
                            nearest_weekday, nth_weekday, last_weekday,
                            next_date, prev_date, nearest_date,)



  1. New Year’s Day: 1 January (or the following Monday if it falls on a Saturday or Sunday)
# 2011-01-01 is Saturday
assert mondayise(year=2011, month=1, day=1,
                 cases=((WEEKDAY_SAT, WEEKDAY_MON),
                        (WEEKDAY_SUN, WEEKDAY_MON),)) == "2011-01-03"
  1. Day after New Year’s Day: 2 January (or the following Monday if it falls on a Saturday, or the following Tuesday if it falls on a Sunday)
# 2011-01-02 is Sunday
assert mondayise(year=2011, month=1, day=2,
                 cases=((WEEKDAY_SAT, WEEKDAY_MON),
                        (WEEKDAY_SUN, WEEKDAY_TUE),)) == "2011-01-04"


Labour Day: The fourth Monday in October

assert nth_weekday(year=2014, month=10, n=4, weekday=WEEKDAY_MON) == "2014-10-27"


Marlborough provincial anniversary day: First Monday after Labour Day

assert next_weekday(year=2014, month=10, day=27, weekday=WEEKDAY_MON) == "2014-11-03"


Wellington provincial anniversary day: 22 January (Monday nearest to the actual day)

# 2014-01-22 is Wednesday
assert nearest_weekday(year=2014, month=1, day=22, weekday=WEEKDAY_MON) == "2014-01-20"


Memorial Day: Last Monday in May

assert last_weekday(year=2014, month=5, weekday=WEEKDAY_MON) == "2014-05-26"


Inauguration Day: First January 20 following a Presidential election

# 2012-11-06 was the previous presidential election day in US
assert next_date(month=1, day=20, offset=(2012, 11, 6)) == "2013-01-20"


All the code is licensed under the GNU Lesser General Public License (v3+).

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