date.go
func IsDate(str string) bool {
	_, err := time.Parse(RFC3339FullDate, str)
	return err == nil
}
func IsDate(str string) bool {
	_, err := time.Parse(RFC3339FullDate, str)
	return err == nil
}
func IsDate ( str string ) bool { _ , err := time . Parse ( RFC3339FullDate , str ) return err == nil }
// IsDate returns true when the string is a valid date
IsDate returns true when the string is a valid date