Time

Turns a calendar date into its day number within the year, and a day number back into a date, with the days remaining, the quarter and the ISO week.

Works out a USSSA playing age from a date of birth and the program's determination date, then names the age group the player belongs in.

Counts a filing deadline in calendar or court days, rolls it off weekends and federal holidays, and adds the three days for service by mail.

Finds the weekday of any date by Zeller's congruence or the doomsday rule, handling the Julian to Gregorian switch that trips up most date tools.

Work percentages on durations rather than plain numbers: what share one length of time is of another, a percentage of a duration, and h:mm:ss in and out.

Convert military time to the 12 hour clock and back, with the 0000, 2400 and 1200 midnight and noon cases handled, plus elapsed time past midnight.

Finds the ISO 8601 week number of any date, and turns a week number back into its seven dates, handling the years that carry 53 weeks.

Turns decimal hours from a timesheet into hours and minutes, and back again, with the nearest minute, tenth and quarter hour payroll uses.

Nominal age by the East Asian reckoning, where a baby is one at birth and everybody gains a year at Chinese New Year rather than on a birthday.

Averages a list of durations, and averages times of day with the circular mean, so 23:00 and 01:00 come out as midnight rather than as noon.

Converts a birth date to the Hebrew calendar and finds the Gregorian date the Hebrew birthday falls on in any year, with bar and bat mitzvah dates.

Works out how long an audiobook takes at a chosen playback speed, how much time that saves, and the speed you need to finish it by a deadline.

Finds the date six calendar months after a birthday, the weekday it falls on, how far away it is, and the age reached on that day.

Counts the calendar days and the working days left until a deadline, and works the other way to find the date a set number of working days out.

The exact gap between two birth dates in years, months and days, both ages on any date, the ratio between them and the day the gap was two to one.

Great circle distance between two sets of coordinates and the flying time at a cruising speed you choose, plus a ground allowance and the initial heading.

Turn a Unix epoch value into a readable date, or a date into a timestamp. Handles seconds and milliseconds, UTC and fifteen local time zones.

Work out PTO hours earned each pay period, the balance on a given date after accrual and time taken, and what those hours are worth in days.

Add up hours worked from clock-in and clock-out times or a week of daily hours, subtract unpaid breaks, and turn the result into regular and overtime pay.

Calculate the moon phase for any date with our free Moon Phase Calculator. View illumination percentage, lunar age, and upcoming phases.

Convert times between different time zones easily with our Timezone Converter. Plan international meetings, calls, and travel with accurate time zone calculations.

Calculate your dog's age in human years with our accurate Dog Age Calculator. Considers breed size, weight, and modern veterinary research for precise age conversion.

Calculate remaining weeks in the current year instantly. Essential for planning, goal setting, and project management. Quick results.

Effortlessly calculate time differences, add or subtract durations, and plan schedules with our time calculator.

Calculate precise time differences between dates and times instantly with our easy-to-use time duration calculator tool.

Quickly add or subtract years, months, weeks, and days from any date with precision using this Date Calculator tool.

Discover how old you are in years, months, days, hours, minutes, and seconds with our comprehensive age calculator tool.