+0100 is the RFC standard way of specifying a time zone offset of 1 hour ahead of GMT/UTC.
Some countries with timezone of +0100 are:
+0000 | +0200
after
http://www.faqs.org/rfcs/rfc1327.html
http://aa.usno.navy.mil/AA/faq/docs/world_tzones.html
http://swissinfo.net/cgi/worldtime/