Date Calculator      Go To Download Page

Use this to compute relative dates and times.  It has three modes - plain dates, date-times, and a:b=c:d.

Plain dates: To add 975 days to December 21, 1999:



Date-Times: Add 600 days, 20 hours and 30 minutes to 5:45 AM on March 10, 1997:



A:B=C:D  (That is, line 1 relative to line 2 will be the same as line 3 relative to line 4.)  I want to test a realtime system's rollover for 2003/2004, and I want the rollover to occur on March 6, 2002 at 11 AM when it's convenient to have all the testers there.  The system has to "cook" for about 2 months, so I'm going to start it cooking after business (say, 6 PM) on January 5, 2002.  What date and time should I set in the test system?  Answer: November 2, 2003 at 7 AM.