I have a excel sheet, where the first column has date and time in the format dd/mm/yy hh:mm:ss AM/PM (For example 02/06/21 03:50:12 PM). I want the to change the time format to show millisecond also. How can I do that?

I tried changing the format of the file you attached and could not format it. If I remove all formatting your time stamps look like this (all the same time!) A proper timestamp, the raw numbers change with time

LabVIEW

Excel time formatting

Solved!

@msabah38 wrote:

I copied and pasted your format (h:mm:ss.000 AM/PM), but it didn't work for me, can you share your screenshot.

What do you mean it didn't work? It is 11 am and shows fractional seconds to 3 digits. I can't change the fact that all your values in the spreadsheet are dead on 11 am.