feat (online-selling): add ValidateTimeOfDay and ValidateDateTime methods
feat (online-selling): add ValidateTimeOfDay and ValidateDateTime methods

original commit: vintage-software/vstack@627fdd14020f9ccd2978187b282b5287d09a7047

split from 23dbf48733f67d34d2a393fee2e1ebbd491bc6f9

vintage-software/vstack