Thanks for the contribution. But, it needs work (I assume that's why the "Please develop it" in your post).
Log(Validation.IsDate("02-01-2003"))
Log(Validation.IsDate("01/01/2003"))
Log(Validation.IsDate("2010-32-88"))
Log(Validation.IsDateTime("02-01-2003 04:23:18"))
Log(Validation.IsDateTime("01/01/2003 04:23:18"))
Log(Validation.IsDateTime("2010-03-22 55:18:75"))
Log(Validation.IsDateTime("2010-03-22 01:01:01"))
Log(Validation.IsDateTime("2010-32-88 01:01:01"))
I stopped testing after that.
Also, please put [B4X] in your thread title as it can (mostly) be used in the other B4X tools as well and that will help in the forum searches.