Date & Time Calculator
Day of the Year Calculator
Find the day number and remaining days within a selected year.
Calculator
Results
Day of year
262
Days remaining103
Year2026
Days in year365
Results are calculated instantly in your browser using the inputs shown. Date and time calculations follow the stated assumptions below.
How it works
Find the day number and remaining days within a selected year.
Day of year = days from January 1 through the selected date, inclusive.
Example
| Example | Result |
|---|---|
| September 19, 2026 is day 262 of 365. | See calculator |
Important notes
- Calendar calculations use Gregorian calendar rules.
- Business-day calculations exclude Saturday and Sunday unless stated otherwise.
- Time-zone calculations depend on the browser's IANA time-zone data.
- For planning purposes, verify dates and times when a contractual or legal deadline is involved.
Frequently Asked Questions
Is January 1 day 1?
Yes.
Does this handle leap years?
Yes; leap years have 366 days.
How to use this calculator
What to enter
Enter or select the following as requested: Date. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The date or duration result is calculated from the entered dates, times, calendar rules, and exclusions. Check inclusive versus exclusive counting, time zone, daylight-saving changes, and whether weekends or holidays are excluded.
When to use it
Use this to plan a date, measure elapsed time, or estimate a deadline. Verify the relevant calendar, location, and legal or workplace rules when they affect the answer.