Movable and regional holidays

Easter-derived dates move each year (computus), lunar-calendar holidays (Eid, Diwali, Lunar New Year) shift against the Gregorian calendar, and many holidays are regional (US state, Canadian province, German Land). A single national list is incomplete.

Class

Case to account for

Affects

1 conversion

Detection

Holiday is lunar/movable, or observed only in a subnational region.

Mitigation

Compute movable dates (Easter computus, lunar tables); key holidays by region, not just country.

Affected conversions

Local datenational holiday flag

OPEN