Day of the Year Calculator

Find which day of the year a date is.

Day of year 185

Days remaining 180

Formula: sum days of prior months + day

Step-by-step with your numbers:

1. Values used:

2. Month = 7 1–12

3. Day = 4

4. Leap year? = 0

6. Day of year = 185

7. Days remaining = 180

Did we solve your problem today?

Find the ordinal day number for any date.

The math behind it

Add the days in all earlier months, plus the day of the month (+1 after February in leap years).

July 4 (non-leap) → day 185.

Use?

Astronomy, agriculture and Julian-style date counting.