Is there a February 30th

Answer 1

Early Julian calendarThe 13th century scholar Sacrobosco claimed that in the Julian calendar February had 30 days in leap years between 45 BC and 8 BC, when Augustus shortened February to give the month of August named after him the same length as the month of July named after his adoptive father Julius Caesar. In fact, if ordinary February 24 was ante diem sextum Kalendas (the sixth day before the beginning of March, February 28 was ante diem secundum Kalendas (the second day before the beginning of March), while February 29 was ante diem (primum) Kalendas (the day before the beginning of March). During leap years, the extraordinary day was added after Febrauary 24, being called ante diem bis sextum Kalendas (the second sixth day before the beginning of March) from whom derived the word bis-sextum which was used to indicate leap years in Neo-Latin languages (French: année bissextile, Spanish: año bisiesto, Italian: anno bisestile).