Date & Time Tools Utilities & Calculators

Accurate chronological tools for age calculation, date differences, business days, and timezones.

Day of the Week & Historical Date Calculator

Find out what day of the week any date fell on (or will fall on), ISO week number, leap year status, and day number of the year.

Convert time between major world timezones (UTC, London, New York, Tokyo, Moscow, Dubai, etc.) taking Daylight Saving Time (DST) into account.

Calculate how many days, hours, minutes, and seconds remain until an upcoming event, holiday, or deadline.

Calculate your exact chronological age in years, months, weeks, days, hours, and minutes, along with a countdown to your next birthday.

Calculate the exact number of days, weeks, months, and years between any two calendar dates.

Calculate the number of business days (Monday through Friday) and weekend days between any two dates.

Calculate elapsed time between start time and end time in hours, minutes, seconds, and decimal hours.