-minus 15 Min exiftool "-AllDates-=0 0:15:0" folderName
-plus 15 Min exiftool "-AllDates+=0 0:15:0" folderName
-minus 2 months 4 days and 15 Min exiftool "-AllDates-=0:2:4 0:15:0" folderName
-minus 2 months 4 days
-minus 15 Min exiftool "-AllDates-=0 0:15:0" folderName
-plus 15 Min exiftool "-AllDates+=0 0:15:0" folderName
-minus 2 months 4 days and 15 Min exiftool "-AllDates-=0:2:4 0:15:0" folderName
-minus 2 months 4 days