W3C schema for the RFC 1123 date format

Here's a quickie I didn't find anywhere: XSD for the RFC 1123 date format, as used in http headers; note its only for GMT and years 2000 -2099 (my particular case):

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:annotation><xs:documentation>Schema for RFC 1123 date format type</xs:documentation></xs:annotation>

<xs:simpleType name="RFC1123_date">
<xs:annotation><xs:documentation>RFC 1123 date format.</xs:documentation></xs:annotation>

<xs:restriction base="xs:string">
<xs:pattern value="(Mon|Tue|Wed|Thu|Fri|Sat|Sun), [0-3][0-9] (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) 20[0-9][0-9] [0-2][0-9]:[0-5][0-9]:[0-5][0-9] GMT">
</xs:restriction>
</xs:simpleType>
</xs:schema>