Macro for Date Adjusting

Hello members of the Excel Help Forum,

I am looking to create a VB instruction on my workbook that will convert dates.

Here is an example:
feb_mar_PDC_report.xlsx

I wanted to create a macro that would be activated by selecting a row and clicking a button.
This macro would take all dates in format MONTH/DAY/YEAR HH:MM:SS and add 3 hours to it, correctly assessing days change in case of a timing going past midnight.

Also, the macro should be able to ignore a cell without a date; with a value such as "N/A" or a name.

If anyone could help or even just point me in the right direction, I'd be very grateful.
Thank you very much for your attention.

Hello Dave,

Thank you for replying.

However, there are multiple columns with timings. Adding one more column for each timing to do the conversion would be impractical.

Is there any way to make this conversion VB-based?
A button that would change all the timings in the row to 3 hours forward.

Excuse me, I'm bumping this just this once.