Morocco will observe daylight saving time in 2010. Microsoft has produced a hotfix to implement this change. If interested in downloading this hotfix, please refer to KB
titled: "A hotfix is available to update the Daylight Saving Time for the "(UTC) Casablanca" time zone for Windows Operating Systems"
This hotfix updates the DST start and end dates for the “(UTC) Casablanca” time zone. More specifically, it sets the DST start date for Morocco to the first Saturday of May 2010 at 23:59:59.999 and the DST end date to the first Saturday of August 2010 at 23:59:59.999.