What Day of the Week Was It?
Find the weekday for any calendar date—past, present, or future. Enter a date to see whether it fell on a Monday, Tuesday, or any other day of the week.
Last updated: July 17, 2026
Enter any calendar date to see which weekday it falls on—Monday through Sunday. The answer uses standard Gregorian calendar rules with no time-zone guesswork beyond the date you provide.
Enter values and calculate
Fill in the form above and press Calculate to see your result.
How this calculator works
Enter any calendar date and the tool returns the weekday name—Monday through Sunday—for that day.
The answer uses the same Gregorian date engine as other DateCalx calculators, including leap-year handling.
Worked example
For July 21, 2026, the weekday appears instantly in the result card—no manual calendar counting required.
Try historical dates for genealogy research, invoice verification, or event timelines, or future dates for travel and meeting planning.
Practical use cases
Scheduling meetings, verifying contract clauses tied to a weekday, planning recurring events, and checking school or payroll calendars all start with knowing the day of the week.
Pair this tool with the Week Number Calculator for ISO week planning, or use Add Days when you need to project forward by a fixed interval.
Frequently asked questions
Enter any calendar date and the calculator returns the weekday name—Monday through Sunday—for that day using standard Gregorian calendar rules.
Yes. Both tools accept any valid calendar date. Use either page for past, present, or future dates—the wording differs, but the calculation is the same.
The result is based on the calendar date you enter, without applying a separate time-zone offset. For most planning tasks, the weekday of the date itself is what you need.
Yes. February 29 and other edge cases follow the same date engine used across DateCalx calculators.
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Written & Reviewed by
DateCalx Team
Editorial Team
The DateCalx Team researches, builds, tests, and reviews every calculator to ensure accurate, reliable, and easy-to-understand date and time calculations. Our goal is to provide fast, trustworthy tools for everyday personal, educational, and professional use.
Last reviewed: July 17, 2026
Learn more in our About, Editorial Policy, and Methodology pages, or contact the DateCalx Team.