Glossary

A leap year is a year that has 366 days, with the month of February having 29 days instead of 28. It occurs every four years.

In some watches, a leap year complication is added to ensure the accurate display of the date. When a watch has a leap year function, it recognizes leap years and automatically updates the date from February 28 to February 29. Watches with a leap year complication have precise mechanisms that calculate days, months, and years accurately, including handling the leap year.

This complex function in watches is important for individuals who value precise date and timekeeping. Thanks to this complication, users do not need to manually adjust the date every leap year as it is done automatically.