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.

This year is a leap year, meaning Feb. 29 was added as the 366th day on the calendar. Here's what to know about its meaning, origin, deals and more.

Eventually, the calendar we all know was adopted by Pope Gregory XIII in 1582, and it's changed little since then — not that ...

Eventually, the calendar we all know was adopted by Pope Gregory XIII in 1582, and it's changed little since then — not that the system is flawless. February gets a leap year once every four ...

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 ...