Aprilis was initially the second month in the year of office of the Roman calendar as well as precursors of April. The month Aprilis originally had 29 days; its etymology is disputed in antiquity: During the calendar of Marcus Fulvius Nobilior in the temple of Hercules Musarum the origin from the Greek name of the goddess of love, Venus, Aphrodite suggests, derives Polyhistor Marcus Terentius Varro aperire him from the Latin word " open " for from what was referring to the vegetation.

In the year 153 BC, the annual commencement of the year was moved to January 1, so the month Aprilis moved to the fourth place in the year of office. After the calendar reform of Gaius Julius Caesar was in the Julian calendar from the year 45 BC by the insertion of an additional day for an extension to 30 days.

Days of Aprilis to 46 BC

Days of Aprilis from 45 BC