Leap year before 1, but only if the year is expressed with astronomical year numbering. It is not valid for the BC or BCE notation. The algorithm is not necessarily valid for years in the Julian calendar, such as years before 1752 in the British Empire. The year 1700 was a leap year in the Julian calendar, but not in the Gregorian calendar. February 29 is a date that usually occurs every four years, and is called leap day. This day is added to the calendar in leap years as a corrective measure, because the Earth does not orbit the sun in
Jewish Talmudic Calendar the previous evening, at the time of sunset, when three mediums sized stars appear. Practically it begins from 6:00 p.m. (18:00) Jerusalem time (16:00 Universal Time). A day is divided into 24 hours, each with 1080 parts (halakim). Thus each minute is composed of 18 halakim; each halakim is 3.33 seconds. There are twelve months in a common year, and thirteen months in a leap year. The New Years Day (Rosh Hashana) is Tishri 1. The months are 30 days and 29 days in turns. A regular common year is 354 days; while a regular leap year is 384 days