oliverweiss

The Julian calendar was 9 days or more off

Pope Gregory commissioned a new calendar because Easter has to occur after the spring equinox 

Bell_curve

In the year of 1582, October, there are 9 days missing.

Try checking on your phone the calendar app.

https://www.britannica.com/story/ten-days-that-vanished-the-switch-to-the-gregorian-calendar

Fun Fact Friday - Best Fun Fact Gets 10,000 Sats

In the year of 1582, October, there are 9 days missing.
Try checking on your phone the calendar app.
Why? Here:
https://www.britannica.com/story/ten-days-that-vanished-the-switch-to-the-gregorian-calendar