Revised Julian calendar
Videos
The Revised Julian calendar, less formally the new calendar, also known as the Milanković calendar, is a calendar proposed in 1923 by the Serbian scientist Milutin Milanković as a more accurate altern
Patriarch Meletius IV of Constantinople, who convened the council that authorised the Revised Julian calendar
Inter gravissimas
Videos
Inter gravissimas was a papal bull issued by Pope Gregory XIII on 24 February 1582. The document, written in Latin, reformed the Julian calendar. The reform has conventionally come to be regarded as a
The first page of the papal bull Inter Gravissimas
