Day of Year Calculator
Day of year, ISO week, Julian day from a date.
Day of year
130
of 365 (35.6%)
Days remaining in year
235
ISO week
2026-W19
Day of week
Sunday
Julian day number
2461171
Day of year (ordinal date) goes 1 to 365, or 1 to 366 in a leap year. This year is not a leap year. ISO 8601 week starts on Monday and uses week 1 to mean the first week with at least 4 days in the new year.
About
Pick a date. Returns ordinal day (1–365 or 366), days remaining in the year, ISO 8601 week, day of week, and Julian day number. Notes whether the year is a leap year.
How to use
- Pick a date.
FAQ
What's a Julian day?+
Continuous count of days since noon UTC on January 1, 4713 BC. Used in astronomy to compute time differences without calendar conversions.