ClickUp reads and provides dates in various formats during imports and exports. This doc explains the three formats you'll see. 


  • Day, date, time, timezone offset
  • English formatting
  • Due dates without specific times are technically due at 4am in the task creator's local timezone
  • Example: May 30, 2019 PST would be Monday, May 30th 2019, 4:00:00 am -07:00

ISO (International Standard)

  • Year, month, day, (T) time
  • Date numbers separated by a hyphen ("-")
  • Time numbers separated by a colon (":")
  • Date numbers less than 10 are preceded with a zero
  • Example: May 30, 2019 would be 2019-05-30T11:00:00.000Z


  • The number of milliseconds that have elapsed since January 1, 1970 
  • This format is the easiest for machines to read and perform calculations and comparisons with
  • Also known as Unix time, Unix epoch, or Unix timestamp
  • Amazing converting tool:
  • Example: May 30, 2019 would be 1559178061000
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