The Hesapstan day of week calculator is designed to calculate which day of the week (Monday, Tuesday, Wednesday, etc.) a date you select falls on. It answers questions like "what day of the week is my birthday this year?" or "was that date a Monday?"
What does the day of week calculator do?
This tool calculates which day of the week the Gregorian calendar date you enter falls on, and shows the weekday name, the ISO weekday number (Monday = 1, Sunday = 7), and whether the date is a weekday or a weekend.
When is this useful?
This tool can be used to verify which day of the week a past date fell on, plan around which weekday a future date (like a birthday, anniversary or appointment) falls on, or check a day referenced in a historical document.
For example, finding out which weekday your birthday falls on next year helps you plan celebrations accordingly.
How is weekend/weekday determined?
The tool treats Saturday and Sunday as the weekend, following common international convention. Some countries use different weekend days; this tool does not apply country-specific distinctions.
What does this tool not calculate?
- It does not calculate using the Hijri or any other calendar system; it works in the Gregorian calendar only.
- It does not account for public holidays; it only shows which day of the week a date falls on.
- It does not distinguish country-specific weekend definitions (such as Friday-Saturday).
Frequently Asked Questions
How do I find which day of the week a date falls on?
Select the date, and the tool calculates which day of the week (Monday, Tuesday, etc.) it falls on according to the Gregorian calendar.
What is the ISO weekday number?
Under ISO 8601, Monday is numbered 1 and Sunday is numbered 7.
Which days are treated as the weekend?
This tool treats Saturday and Sunday as the weekend; it does not distinguish country-specific definitions.
Does this tool also work with the Hijri calendar?
No. It only works with Gregorian calendar dates.