The iGrafx software will not be affected by Daylight Savings Time (DST) changes. The iGrafx software does NOT need any patch or update for daylight savings changes. For Your Information: Daylight Saving Time (DST), also known as summer time, is a convention adopted by on a seasonal basis. Usually DST adjust one hour forward for the spring, summer, and early autumn periods. DST is often promoted it as an energy conservation measure, on the assumption there is more effective use of natural sunlight; there is less darkness in the day, and thus less use of electric lights. For those in the USA and Canada: One of the key provisions of the Energy Policy Act of 2005 is to extend Daylight Saving Time (DST) by approximately four weeks. In compliance with this provision, beginning in 2007, DST dates in the United States and Canada will start three weeks earlier (2:00 A.M. on the second Sunday in March) and will end one week later (2:00 A.M. on the first Sunday in November).