Julian Date Converter
Convert a calendar date to the astronomical Julian Day number and to the YYDDD ordinal “Julian date” used in manufacturing, food dating and the military.
Result
Ordinal date (YYDDD)
26298
- Ordinal date (YYYYDDD)
- 2026298
- Julian Day Number (noon UTC)
- 2461339
- Julian Date at 00:00 UTC
- 2,461,338.5
- Day of the year
- 298
Common questions
Which “Julian date” do I need?
Food packaging, pharmaceuticals and the U.S. military usually mean the ordinal date: a two-digit year then the day of the year, so February 1, 2026 is 26032. Astronomers mean the Julian Day, a running count of days since 4713 BC.