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Code: Select all

; check date is valid:
date1 := "13.12.2020"
date2 := "33.12.2020"
MsgBox % Is_dd_MM_yyyy(date1) ; True
MsgBox % Is_dd_MM_yyyy(date2) ; False
return

Is_dd_MM_yyyy(date)
{
	local date2
	if !RegExMatch(date, "^\d{2}\.\d{2}\.\d{4}$")
		return False

	date2 := Format("{3:04}{2:02}{1:02}", StrSplit(date, ".")*)
	if date2 is Time
		return True
	return False
}

Code: Select all

; check date is valid:
date1 := "13.12.2020"
date2 := "33.12.2020"
MsgBox % Is_dd_MM_yyyy(date1) ; True
MsgBox % Is_dd_MM_yyyy(date2) ; False
return

Is_dd_MM_yyyy(date)
{
	; local D ; this does not work!
	if !RegExMatch(date, "^(\d{2})\.(\d{2})\.(\d{4})$", D)
		return False

	D := D3 D2 D1
	if D is Time
		return True
	return False
}