transitive verb (-lated; -lating) see: low Date: 1603 to insert (as a day) in a calendar, to insert between or among existing elements or layers, see: introduce intercalation noun
INTERCALATE
Meaning of INTERCALATE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012