validation-regex="^(((0?[1-9]|1\d|2[0-8])/(0?[1-9]|1[0-2])(29|30)/(0?[13-9]|1[0-2])31/(0?[13578]|1[02]))/\d{4}|29/0?2/(\d\d(0[48]|[2468][048]|[13579][26])|([02468][048]|[13579][26])00))$"