A.M.

Ante meridiem, before noon. Only the abbreviation is ordinarily used.

Also artium magister, master of arts.

Also annus mirabilis, the wonderful year-1666, the year of the defeat of the Dutch fleet and of the great London fire.

Also anno mundi, in the year of the world; that is, when the creation of the world is said to have taken place, 4004 B.C.