[Clyde Schechter]

Yes, you will get milliseconds precision. To see the milliseconds precision with your eyes you need to apply the %tcDDmonCCYY_HH:MM:SS.sss display format as shown above. But whether you make it visible to your eyes or not, it will be there: all Stata date-times are stored to millisecond precision (provided you remember to make the variable a double) and calculations with them are performed at millisecond precision.

[Grettel Romero]

Thank you very much Nick! Your code really helped me to understand it
William and Clyde Thank you too.

I promise to read the FAQ to poste my questions and codes better.

[Grettel Romero]

Thank you Clyde!