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The Julian day or Julian day number (JDN) is the number of days that have passed since the initial epoch defined as noon Universal Time (UT) Monday, 1 January 4713 BC in the Julian calendar. That noon-to-noon day is defined as Julian day 0.
- What is today's Julian date number?
- What is a Julian number?
- What is day 0 in Julian calendar?
- What is a 5 digit Julian date?
What is today's Julian date number?
Today's date is 18-Jan-2023 (UTC). Today's Julian Date is 23018 .
What is a Julian number?
The first two digits are the last numbers of the year and the three digits after the hyphen are the day of that year. So, for instance, a Julian date of 21-001 represents the first day of the year 2021, or January 1, 2021, while a Julian date of 22-165 represents the 165th day of the year 2022 or June 14, 2022.
What is day 0 in Julian calendar?
Astronomers simplify their timekeeping by simply counting the days. All days are numbered consecutively from Julian Day 0, which began at noon on January 1, 4713 B. C. January 1st, 1993, was JD 2448989; January 1st, 2000 will be JD 2451545. The Julian Day begins at noon, Greenwich Mean Time.
What is a 5 digit Julian date?
The Julian date format is a five digit number broken into two parts: a two-digit representation of the year followed by a three-digit representation of the day of the year. For example, January 1st, 1999 is 99001 in Julian format.
