Possibly from Latin 'aperire' (to open) — the month when buds open — or from Aphrodite, goddess of love.
The fourth month of the year in the Gregorian and Julian calendars, consisting of 30 days.
From Latin 'Aprīlis,' whose etymology is debated. The most widely cited ancient explanation, from Varro, connects it to Latin 'aperīre' (to open), referring to the opening of buds and flowers in spring. An alternative theory links it to 'Aphrō,' a shortened form of Aphrodite, the Greek goddess of love whom the Romans identified with Venus. A third possibility is that it derives from an Etruscan borrowing
The tradition of April Fools' Day may be connected to France's 1564 adoption of the reformed calendar, which moved New Year's Day from late March to January 1. Those who continued celebrating the old New Year in late March or early April were mocked as 'April fools' — though this popular explanation is not definitively proven.