Date & Time Tools
Count days between dates and business days, find week numbers and convert time zones.
Time Zone Converter
Convert a date and time between two time zones; UTC offsets and daylight saving time are handled automatically.
Open toolDays Between Dates Calculator
Count the days between two dates and see them as weeks, months, years, hours and weekdays.
Open toolDate Calculator (Add or Subtract Days)
Add or subtract days, weeks, months and years to a date and see the result and weekday.
Open toolBusiness Days Calculator
Count working days between two dates or add working days to a date, skipping weekends and your holidays.
Open toolWeek Number Calculator
Find the ISO 8601 week number of any date, or the start and end dates of a given week.
Open toolICS Calendar Event Generator
Create a downloadable .ics calendar event with title, time, location, description and reminder.
Open toolDate and duration calculations
Find how many days, weeks or months lie between two dates, add 90 days to a date to get a deadline, or count business days while skipping weekends and holidays.
Time zones and calendars
The time zone converter tells you when a meeting abroad takes place in your local time. The ICS generator creates an event file for Google Calendar, Outlook and Apple Calendar.
ISO 8601 week numbers
The week number calculator shows the ISO week used in planning and reporting, along with the start and end date of that week.