Year: {{{field| Year|input type=regexp|regexp=/^\d{4}$!^$/|size=4|message=The year field can accept only integers and must be 4 digits in length!}}}</includeonly>
Year: {{{field| Year|input type=regexp|regexp=/^\d{4}$!^$/|size=4|message=The year field can accept only integers and must be 4 digits in length!}}}</includeonly>