UTC Seconds Calculator

Calculate ‘UTC seconds’ (sometimes also called ‘epoch seconds’ or ‘unix seconds’) as the number of seconds since at 01-01-1970 00:00:00 for the GMT date/time provided. Will also allow you to enter UTC seconds or daynumber and compute the appropriate GMT date/time and yearday fields.

Notes:

  1. If an invalid date such as Apr’31 is entered, UTCcalc will compute UTC seconds for May 1st. The select list fields are updated to reflect the correct representation of date/time.
  2. UTCcalc will not handle dates before 01-Jan-1987 00:00:00
  3. UTCcalc will not work with Netscape 3.x – (missing date.getUTCFullYear() function)

This is version: 2.4 16-Sep-2005

Month Day Year Hour Minute Seconds GMT

UTCseconds YearDay