Day
Wednesday
Date
22 April 2026
Day of Year
112
Week 16
Date & Time
Day of Week Calculator
Find which weekday a date falls on (Monday, Tuesday, etc.).
By Calculator Suite Pro Editorial Team | Last updated March 18, 2026
Use this page when a date, age, duration, or timezone detail needs a calendar-aware check before you use the result.
Explore the Date & Time group for nearby calculators, examples, and guide links.
About this calculator
A day-of-week calculator tells you whether a specific date is a Monday, Tuesday, and so on. This is useful when scheduling, planning deadlines, or verifying dates in records.
This tool also shows the formatted date, day-of-year, and an approximate week number so you can quickly orient yourself in the calendar.
For timezone conversions (for example, a meeting time in London vs New York), use the Timezone Difference Converter instead.
Calendar logic
A short look at how the date or time inputs are interpreted before the output is shown.
- The calculator parses the selected calendar date and computes the weekday from the date value.
- Because the input is a date (not a time), the result does not depend on your local time-of-day.
- Day-of-year is computed as the offset from January 1 in the same year.
- Week number is a quick approximation derived from day-of-year for basic planning.
Date rules used
These are the counting, timezone, or unit-conversion rules used for this date/time workflow.
- Day-of-year is computed as the offset from January 1 in the same year.
- Week number is a quick approximation derived from day-of-year for basic planning.
Where this date tool helps
Use these scenarios to decide whether the page fits your cutoff, schedule, or planning question.
- Event planning (weddings, exams, launches)
- Meeting and deadline planning
- Checking a birthday weekday
- Verifying dates in journals or records
- Work shift and rota planning
- Planning trips (departure/return weekday)
- Estimating week-of-year for schedules
- Avoiding weekend scheduling mistakes
How to run the date check
- Pick a date using the date picker.
- The weekday result updates instantly.
- Use the extra stats (day of year, week number) for planning.
- Change the date to compare different days quickly.
Date mistakes to avoid
Most confusing date results come from endpoint rules, local dates, or input format differences.
- Confusing a date with a datetime. Weekday is for the date only.
- Typing the date in the wrong locale when entering manually.
- Assuming the result changes with timezone (it shouldn’t for date-only inputs).
- Using week number as an ISO week number (this tool shows a quick approximation).
- Expecting a different weekday due to daylight saving time (DST affects time, not the date).
Date-handling tips
- Use this tool when you only care about the weekday, not the time.
- For time differences between regions, use the Timezone Converter.
- For counting days between two dates, use Date Difference.
- For planning a schedule, check both the weekday and the date range.
- If you are calculating age, the Age Calculator includes weekday-of-birth too.
- For recurring weekly events, compare multiple dates across months to spot patterns.
Glossary
Quick definitions for date and time terms used on this page.
Weekday
The day name (Monday through Sunday) for a calendar date.
Day of year
The number of the day within the year (1–365/366).
Date examples
Specific date
Input: Date: 2026-02-13
Output: Friday
New year check
Input: Date: 2000-01-01
Output: Saturday
Holiday planning
Input: Date: 2026-12-25
Output: Weekday shown for the selected year
Date and time guides
Related explainers that add context around date rules, cutoff dates, and scheduling workflows.
How Old Am I? Age Calculator for Exact Years, Months, and Days
A detailed guide to calculating exact age from date of birth, with examples, edge cases, and common mistakes.
Age on a Specific Date (Past or Future): How to Use an Age Calculator
Learn how to calculate age on any date for forms, admissions, events, and planning using a reliable workflow.
Next Birthday Calculator: How Many Days Until Your Birthday?
A practical walkthrough: next birthday, days remaining, and common date-format errors to avoid.
FAQ
Is the weekday based on my location?
For date-only inputs, weekday is derived from the calendar date itself, not your timezone.
Can I use this for historical dates?
Yes for modern Gregorian calendar dates. For very old historical records, local calendar adoption can differ by region.
Why does the week number look different from my calendar app?
Some calendars use ISO week numbering. This tool provides a quick week-of-year approximation based on day-of-year.
Does the result change if I travel to another timezone?
Not for the same calendar date. Timezone matters when converting a specific time, not a date-only value.
Can I find out what day I was born?
Yes. Enter your birth date to see the weekday. The Age Calculator also includes weekday-of-birth.
How do I count weekdays between two dates?
Use Date Difference for the range, and combine with a calendar view if you need weekday counting across the span.
Date references and update notes
Last updated: March 18, 2026
Reviewed by Calculator Suite Pro Editorial Team.
For official deadlines, compare this output with the exact date rule from the relevant organization.
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