Date & time

Answer “how long” and “what day” questions without spreadsheets. Handy for travel, HR-style math, and project timelines—runs locally in the tab.

This category at a glance

Ages, date differences, time zones, Unix time—calendar math without a spreadsheet. Simple, fast, private; copy results into tickets and invites.

Tools

Age CalculatorAge from birth dateDate & Time
Date DifferenceDifference between two datesDate & Time
Date Duration CalculatorDuration between datesDate & Time
Time Duration CalculatorDuration between two timesDate & Time
Timezone ConverterConvert between time zonesDate & Time
Unix Timestamp ConverterTimestamp to date and backDate & Time
Day of Week CalculatorDay of week for any dateDate & Time
Week Number CalculatorWeek number of the yearDate & Time

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