New Delhi [India], Feb 28 : Happy Birthday to the folks celebrating their birthday after four years, because not every year has a February 29!
After four years, the year 2020 has come with that one extra day in February, taking the calendar from 365 days in a year to 366.
This extra day is what we call 'Leap Day'. Such a day happens after every four years to keep the calendar year in synchrony with the astronomical year, or the time it takes Earth to make a full rotation around the sun.
Things might be complicated to take an account of, as seasons and astronomical events aren't uniform on a global scale, but, leap day occurs in years that are multiples of four or can be evenly divided by 400.
A catch here is that a year ending with 00 is not a leap year. But if the year '00' is preceded by a multiple of four, remains a leap year.
For example, 1700 or 1900 are not leap years, but 2000 or 2400 are!
Another easy way to understand the marking of the leap year would be to take note of the day your birthday befalls. If your birthday fell on a Monday during a normal year and the following year was a Leap Year, your birthday the following year would fall on a Wednesday instead of a Tuesday.
A fun fact around that, people born on a leap year day are often called 'leaplings' or 'leapers'.
Going back in history, it was Romans who first designated February 29 as the leap day.
Some historical events that have happened during leap years include the Battle of Little Bighorn in 1876 fought by George Armstrong Custer, a United States Army officer and cavalry commander in the American Civil War.
The Titanic sank in 1912, and it is in the leap year of 1752 that Benjamin Franklin discovered electricity.
Some notable folks born on February 29 are Olympic swimmer Cullen Jones, actor Antonio Sabato Jr, Rapper Ja Rule and poet/rapper Saul Williams.
Think before you leap with any discovery, if done, the day could be celebrated only once in four years!