The U.S. Energy Policy Act of 2005, passed by the U.S. Congress July, 2005, extended Daylight Saving Time (DST) in the U.S. by approximately four weeks. As a result, beginning in 2007, DST will start three weeks earlier on March 11, 2007, and end one week later on November 4, 2007, resulting in a new DST period that is four weeks longer than previously observed. These four weeks are referred to in this article as the "extended DST period".
Unless certain updates are applied to your computer, it is possible that the time zone settings for your computer's system clock may be incorrect during this four week period. This depends on where you live and which time zone you have selected. To see the time zone settings on your computer, follow these directions.
When your time zone settings are incorrect your clock may be off by one hour, and certain applications running on your Windows based computer may not display the correct time. To address this, Microsoft is providing many free updates and tools that will update your system automatically.
All computers in the United States must be upgraded before March 11, 2007. If users fail to update their operating system by the March 11th, any documents created within Retail Pro will likely display and store time zone information incorrectly. Application of the Daylight Savings Time maintenance pack afterwards will not correct these former documents