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· Quick search anywhere with Ctrl + KFind the ISO week number for any date, and see the full week's date range.
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Date → Week: Enter any date to see its ISO week number and the Monday–Sunday range of that week.
Week → Dates: Enter a year and week number to see the exact dates of that week.
Project planning with week-based sprints, payroll periods, reporting by calendar week, or any scheduling system that references weeks by number.
Add or subtract years/months/weeks/days from any date — leap-year aware, weekday output, instant. 100% client-side.
Calculate working days between two dates, excluding weekends and holidays.
Find the exact difference between two dates in days, weeks, months, and years.
Convert Unix timestamps to human-readable dates and back.
Calculate the duration between two times in hours, minutes, and seconds.