Here is how to create a custom calendar. The example given is a french calendar -- so it provides many examples.
from pandas.tseries.holiday import AbstractHolidayCalendar, Holiday, EasterMonday, Easter
from pandas.tseries.offsets import Day, CustomBusinessDay
class FrBusinessCalendar(AbstractHolidayCalendar):
""" Custom Holiday calendar for France based on
https://en.wikipedia.org/wiki/Public_holidays_in_France
- 1 January: New Year's Day
- Moveable: Easter Monday (Monday after Easter Sunday)
- 1 May: Labour Day
- 8 May: Victory in Europe Day
- Moveable Ascension Day (Thursday, 39 days after Easter Sunday)
- 14 July: Bastille Day
- 15 August: Assumption of Mary to Heaven
- 1 November: All Saints' Day
- 11 November: Armistice Day
- 25 December: Christmas Day
"""
rules = [
Holiday('New Years Day', month=1, day=1),
EasterMonday,
Holiday('Labour Day', month=5, day=1),
Holiday('Victory in Europe Day', month=5, day=8),
Holiday('Ascension Day', month=1, day=1, offset=[Easter(), Day(39)]),
Holiday('Bastille Day', month=7, day=14),
Holiday('Assumption of Mary to Heaven', month=8, day=15),
Holiday('All Saints Day', month=11, day=1),
Holiday('Armistice Day', month=11, day=11),
Holiday('Christmas Day', month=12, day=25)
]