Английский разговорный словарь (основной) - intercalary
Intercalary
intercalary
ɪnˈtə:kələrɪ adj. 1 a (of a day or a month) inserted in thecalendar to harmonize it with the solaryear, e.g. 29 Feb. in leap years. b (of a year) having such an addition. 2 interpolated; intervening. [L intercalari(u)s (as INTERCALATE)]