Please select a date for the Julian, Gregorian or Jewish calendar to convert them into each other. The date according to the Thai solar calendar and the Shire calendar will also be displayed.
The Julian calendar is used since 46 BC by order of Julius Caesar. In this calendar, a normal year had 365 days, every four years was a leap year with 366 days and February 29th as the leap day. This calendar was based on a year length of 365 1/4 days. The actual year length is 365.2421875 days, so the Julian calendar was about 11 minutes and 14 seconds too long. As a result, it was replaced in 1582 by the Gregorian calendar that is in use today. In this calendar, too, every four years is a leap year, but not every 100 years, but then every 400 years. See the list of leap years. The Julian calendar started from the year 525 on counting with the presumed year of Christ's birth, and this was retained by the Gregorian calendar.
The Jewish calendar is a lunisolar calendar, so it takes the moon and the sun into account. The months are based on the new moon, and a year has 12 months. Since 29.53 days pass between two new moons, a year is about 11 days too short, so a leap month is added about every three years. The Jewish calendar was established in 359, and the counting begins in 3761 BC, the date of the creation of the world assumed at this time.
The Thai solar calendar is based on the Gregorian calendar, but uses the Buddhist calendar, which begins 543 years BC with the death and entry into nirvana of Buddha Siddhartha Gautama.
The Shire calendar is probably the most popular calendar in a fantasy world and comes from the book The Lord of the Rings by J.R.R. Tolkien. It assumes the same length of the year as in reality and is therefore transferable to our years.