Day of the Week Calculator
Return the weekday name for a calendar date using Gregorian weekday rules.
Use calculatorCalculator category
Date & Time
Date and time calculators for durations, hours, age style spans, and schedule oriented time math.
Time Zone Calculator
Compare times across zones for meetings and travel planning.
Use calculatorSleep Calculator
Suggest bedtimes from wake hour, wake minute, and minutes to fall asleep.
Use calculatorTime Calculator
Add or subtract hours and minutes with simple time arithmetic.
Use calculatorHours Calculator
Find elapsed hours and minutes between start and end clock times, including overnight spans.
Use calculator