Gregorian Calendar Adopted
October 4, 1582
Pope Gregory XIII dropped ten days from the Julian calendar to realign the spring equinox with March 21 and introduced a new leap-year rule. Thursday October 4 was followed by Friday October 15. Catholic Europe fell in line quickly, while Protestant and Orthodox states would take centuries to catch up.
In context
Also in 1582 (3 other events on record)
- Honno-ji Incident · East Asia · Politics
- Matteo Ricci Arrives in Macao · East Asia · Religion
- Hideyoshi Avenges Nobunaga at Yamazaki · East Asia · War
Before and after in Europe
- Before: 1581: Moscow Burns Books
- After: 1583: Gilbert Publishes Discourse
Before and after in Science
Era
Renaissance (1501–1650), one of 715 events from that era on Saeculum.