Day of Year Calculator
Find the ordinal day (1–366) of a date within its year.
Input Data
Date
Results
182
2026 年平年：第 182 天，剩餘 183 天。
At a glance:Day of year = days from Jan 1 of that year + 1 (1–366, 366 in leap years), plus the remaining days of the year. Complements date-add, date-difference and countdown.
Formula
ordinal = date − Jan 1 of year + 1.
How to Use
- Enter the date.
- The tool returns the ordinal day and remaining days.
Case Studies
2026-07-01 → day 182
In a common year July 1 is the 182nd day.
FAQ
Leap year?
Feb 29 exists, so the maximum is 366.
Where is it used?
Scheduling and serial numbering.
What is the precision?
Whole days.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.