Day of the Week Calculator
Return the weekday name for a calendar date using Gregorian weekday rules.
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Date & Time
Time Zone Calculator
Convert a clock time from one UTC offset to another using minute based UTC math.
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.
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