Change AM to PM on Date/Time

[DS256]

I'm sorting through some wedding photos of a relative. One of the two photographers had their camera time set to AM and not PM for the afternoon wedding. This is causing me grief in sorting photos by creation date in Lightroom.

Is there some trick I could use to find and changed creation dates taken at 2AM to 2PM?

Thanks

[StarGeek]

EXIF time stamps use a 24-hour clock. You can look at all the time related tags in a file with
exiftool -time:all -G1 -a -s /path/to/files/

You need to figure out if you want to add 12 hours or subtract 12 hours. Then your command would be either
exiftool -AllDates+=12 /path/to/files/
or
exiftool -AllDates-=12 /path/to/files/

[DS256]

Thanks @stargeek. Today I realized my question should not be changing AM to PM but adding the 12 hours to correct the time. Thanks for the example.