Date of birth Day 20 missing

In Manage customers you can not do a search for customers born on XX-20-XX, it is not there.  Every other number is there but 20 doesn't show up.

The entry for the 20th is indeed missing from the dropdown list (ddlDateOfBirthDay) in version 1.90.

To fix, edit file: Administration\Modules\Customers.ascx and add the following after line 101:

    <asp:ListItem Text="20" Value="20" />

Save the file and reload the page.

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