These holidays will be included in addition to any specified on model initialization.
add_country_holidays(m, country_name)
Prophet object.
Name of the country, like 'UnitedStates' or 'US'
The prophet model with the holidays country set.
Holidays will be calculated for arbitrary date ranges in the history and future. See the online documentation for the list of countries with built-in holidays.
Built-in country holidays can only be set for a single country.