While Leap Year is a fun rom-com (which I recommend for anyone who’s a fan of rom-coms, Ireland, or Matthew Goode) and a great way to wrap up February-the-month-of-love…this post is only tangentially about it. In my last post, I talked a bit about the Lunar New Year, and it would be remiss of me if I didn’t also talk about our solar calendar and it’s fun quirk: the leap year.

What is a leap year, why is a leap year, and what does it do besides give February an extra day? Well, I did some digging and it turns out the leap year exists partly because of the sun, partly because of Julius Caesar, and partly because of a Pope.

In 46 BCE, Julius Caesar decided to reform the Roman Calendar, because their year was about 10 days shorter than ours. In order to keep the seasons happening at a regular time, they would simply add a new month to the year whenever it was needed. Inspired by the Egyptians’ more regular solar calendar, Caesar decided to make the year 365 days long instead, to match the time it takes the Earth to orbit the sun. The new Julian calendar sounded like a simple fix, but implementing it took a bit of finagling. To make the transition from the old Roman calendar to the new one flow well, Caesar made that first new year 445 days long and then adjusted the next to our familiar 365 days.