formula to increment date time value in excel

Question

I have intial date time in this format '2017-01-01 09:00:00.000' I want to increment it by preferably by millisecond. Even second will do. I can't find formula for to increment Date time in particular format. What I found was Time(hours,minutes,seconds) but it does not work.

Answer 1

Assuming your date is in Cell A1. The formula to add 1 second would be =A1+1/86400. To add a millisecond would be =A1+1/86400000. To add 5 milliseconds would be A1+5/86400000