📅 Date & Time Tools
Time zones, countdowns, business days and week numbers — calendar math made instant.
All date & time tools
Time Zone Converter
Convert times between world time zones, DST-aware.
Date Difference Calculator
Days between dates, with weeks, months and working days.
Age Calculator
Exact age in years, months, days — plus next-birthday countdown.
Event Countdown
Days, hours and minutes until any date.
Date Calculator
Add or subtract days, weeks, months or years from a date.
Business Days Calculator
Count working days between dates or add business days.
Week Number Calculator
ISO week number of any date, with the week's date range.
Time Calculator
Sum durations (hh:mm:ss) — totals and decimal hours.
Random Date Generator
Random dates in a range, sorted or shuffled.
Moon Phase Calculator
Moon phase, age and illumination for any date.
About these tools
Convert times between world time zones with daylight saving handled correctly, count business days, find ISO week numbers, add or subtract from dates with month-end awareness, sum durations for timesheets, count down to events and check the moon phase for any date. All the calendar arithmetic that is error-prone by hand and instant here.
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