Leap years help keep our calendars in sync with Earth's orbit, but have you ever wondered why we need them?

In this episode, we explore the history of leap years, covering early human calendars, Julius Caesar's reforms, and the adjustments introduced by Pope Gregory XIII.

Why do we need leap years?
Earth's orbit and the solar year explained
How the first calendars were created
Egyptian and Roman calendar systems
The Julian calendar's introduction of leap years
Inaccuracies in Caesar's calendar calculations
The Gregorian calendar and its leap-year rule
Challenges in adopting the Gregorian calendar
Alternative calendar systems proposed over time
The impossibility of changing Earth's orbit for an exact year

Full interactive transcript, subtitles and key vocabulary available on the website: https://www.leonardoenglish.com/podcasts/science-leap-years

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