There are approximately 86,400.002 seconds in a solar day, leading to the invention of the leap second to keep Coordinated Universal Time in sync with standard time. Leap seconds are inserted almost once a year and are more common than leap years. They are usually added on the last day of June or December and […]
Leap years add an extra day to keep calendars in sync with seasons and astronomical events. The Gregorian calendar adds a day every four years except for years ending in -00, unless they are divisible by 400. Other calendars have different methods for adding leap years, with varying degrees of accuracy. Leap years have traditions […]
A leap year has 366 days, with February 29 as an extra day, occurring every four years to keep the calendar in sync with the solar year. The tradition of women proposing on February 29 dates back to ancient Ireland. Those born on February 29 are called “jumpers” and special adjustments are made for them. […]
