Wirelessly posted (Vodafone/1.0/HTC_Touch_Pro2/1.14.161.6 (50207) Opera/9.50 (Windows NT 5.1; U; en))
Got to be safest with the universal kilt. Only thing that can be considered approriate for any occassion from a wedding, a funeral, a royal garden party or a rugby match.
If in doubt, wear tartan.