On This Day

Events in History in October 1582

Gregory Conquers Julius CaesarGregory Conquers Julius Caesar

Oct 4 Last Julian calendar day in Spain, Portugal and pontifical states. To sync to the Gregorian calendar, 10 days are skipped and the next date is Oct 15.

Read Article
Pope Gregory XIII with the calendar that was to make his name
Pope Gregory XIII with the calendar that was to make his name
Read Article
  • Oct 15 Gregorian calendar introduced in Spain, Portugal and pontifical states, after skipping 10 days after Oct 4 to sync the calendar