February 29 is an “extra” day of the year.
As it is known, every four years February ends on the 29th instead of the 28th. These years are one day longer than others, i.e. 366 days. And that day is today. An astronomical year usually lasts 365.242 days. Scientists decided to add an extra day every four years when they created the calendar to round off the end of the cycle. This is the result of many centuries, not a day or a month. In general, this year there is one extra day. Those born on February 29 should celebrate their birthday louder than most people. Because they cannot invite their friends and relatives to their birthday every year.