Daylight Saving Time Changes

Daylight Saving Time Changes

In August of 2005 the United States Congress passed the Energy Policy Act, which changed the dates of both the start and end of daylight saving time (DST). This law went into effect in 2007. DST now starts three weeks earlier (2:00 A.M. on the second Sunday in March) and ends one week later (2:00 A.M. on the first Sunday in November) than what had traditionally occurred.

ESE responded immediately by updating the firmware and software for all new product shipped after August 19, 2005. But, this change in DST will have an impact on several of the older Master Clocks and GPS based product manufactured by ESE prior to the Energy Policy Act.

The solution for this governmental DST change is to purchase and install a new updated micro controller. The micro controller has a cost of $75.00 and includes installation instructions. Please click the link below to access the Order Form.

If you were unable to obtain a chip prior to the DST change, you may temporarily disable the Auto-DST function on your master and advance the time zone manually. Refer to your manual for this procedure.


DST Standard IC Locations (PDF)

IC Change Instructions (PDF)