The original Roman calendar divided the year from March to December into 10 months of either 29 or 31 days, based on lunar ...
To correct this, Gregory convened a commission of experts who fine-tuned the leap-year system, giving us the one we have today. But the Gregorian calendar isn’t the only legacy Pope Gregory left.
Finally, the calendar we all know was adopted by Pope Gregory XIII in 1582. After skipping 10 days in October 1582 to "catch up," it has changed little since then. What to know about February and ...