I want to validate BirthDate, which should be in mm/dd/yyyy format, on the client

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Editorial Team

Asked: May 28, 20262026-05-28T18:15:18+00:00 2026-05-28T18:15:18+00:00

I want to validate BirthDate, which should be in mm/dd/yyyy format, on the client

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I want to validate BirthDate, which should be in “mm/dd/yyyy” format, on the client side.

I have tried it as following, but it is not working properly:

$("#btnUpdateEditCB3").click(function(event) {
    var txtBirthDate = $('#<%= txtBirthDateCB3.ClientID %>').val();
    var txtNickName = $('#<%= txtNickNameCB3.ClientID %>').val();
    if (txtBirthDate != "") {
        if (txtBirthDate.match(/^(?:(0[1-9]1[012])[\/.](0[1-9][12][0-9]3[01])[\/.](1920)[0-9]{2})$/)) {
            alert("Please enter date in mm/dd/yyyy format");
            $('#<%= txtBirthDateCB3.ClientID %>').focus();
            return false;
        }
    }
});