- Jan 1 Korean naval commander Admiral Yi Sun-sin begins his famous war diary "Nanjung ilgi" (included in UNESCO's Memory of the World 2013) [1]
- Jan 30 Ippolito Aldobrandini elected Pope Clement VIII
- Mar 14 "Ultimate Pi day": on this day at 6.53am is the largest correspondence between calendar dates and significant digits of pi, since the introduction of the Julian calendar (3.14159265358)
- May 29 Korean navy led by Admiral Yi Sun Shin repels a Japanese fleet in the Battle of Sacheon, the first use of a Korean Turtle ship
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V