Birthday Tools
Birthday Finder
Enter a date of birth to find the day of the week it fell on, and what day the next birthday lands on.
About this calculator
This birthday finder looks up the exact day of the week for any date of birth — useful trivia, and handy for planning birthday parties around a weekday or weekend.
It also shows what day of the week the next birthday will fall on, so you can plan ahead.
How it works
Enter the date of birth
Any valid calendar date works.
Calculate
The tool looks up the exact weekday for that date.
See the result
View the birth weekday and the weekday of the next birthday.
Frequently asked questions
How far back does this work?
The calculation works for any valid calendar date using the standard Gregorian calendar.
Why does the weekday matter for the next birthday?
It's handy for planning — knowing whether a birthday falls on a weekday or weekend affects how people celebrate it.