Gregory Conquers Julius Caesar
![Pope Gregory XIII with the calendar that was to make his name](https://www.onthisday.com/images/articles/pope-gregory-xiii.jpg)
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Historical Events
- 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.
Famous Deaths
- Theresia van Avila, Spanish mystic writer, dies
About October 4, 1582
Calendar: Julian
Day of the Week: Thursday
How Long Ago? 441 years, 9 months and 7 days
Leap Year: No
Star Sign: Libra