Clocks will turn back an hour at 2 a.m. Sunday, Nov. 3, as daylight saving time ends.

Although clocks were turned back in the past to conserve energy — an idea from Benjamin Franklin — daylight saving time did not officially begin until 1916.

Germany created the event as a way to conserve fuel during World War I.

In 2007, the United States changed daylight saving time’s start and end dates to the second Sunday of March and first Sunday of November.

Even though the United States changed the dates, not all states undertake the time change.

Arizona and Hawaii do not follow the time change.

In Arizona, an exemption statute began in 1968, allowing the state to disregard daylight saving time.

Hawaii opted out under the Uniform Time Act in 1966 and never observed the time change.

Hawaii’s location in reference to the equator creates little difference between summer and winter daylight hours.