San Marcos and Hays County residents will need to reset their clocks this weekend as Daylight Savings Time (DST) takes effect on March 8 at 2 a.m.
According to the United States Naval Observatory, DST was originally implemented in the United States and Canada in 1918 as a federal law, but was repealed the following year. It was then re-established in 1942 during World War Two, and was observed until the end of the war in 1945.
After the war DST became a matter for individual states and communities until the Uniform Time Act of 1966. The act still allowed for local exemptions but set the time change for the last Sunday in April. During the 1970s energy crisis, Congress began enacting earlier starting dates for DST. In 1986 a law was passed that changed the date to the first Sunday in April.
The most recent change to DST came with the Energy Policy Act of 2005, which set the starting date for DST to the second Sunday in March, and ending the first Sunday in November. However, many places in the country do not observe it, most noticeably the States of Hawaii and most of Arizona. Indiana only adopted DST in 2006.