When and How to Change Your Clocks for Daylight Saving Time

Daylight Savings Time Changes from Year to Year

Calendar (focus on Thursday's dates)
••• Dan Burn-Forti/ Stone/ Getty Images.

Daylight savings time involves clocks are set ahead of standard time during part of the year, usually by 1 hour. Today, about 40-percent of countries worldwide use it to make better use of daylight and to conserve energy.

Why Do We Have Daylight Savings Time?

Daylight Savings Time was first used in 1908 in Canada, it was popularized in Germany started around 1926, and then it slowly caught on around the world.

In theory, Daylight Savings Time makes it easier to save money on the cost of electricity for lights and other needs, though the reality is that such savings are now negligible.

What Time Do I Change My Clocks for Daylight Saving Time?

Officially, the law requires businesses and timekeeping institutions to change clocks at 2:00 a.m. when Daylight Saving Time (DST) changes occur. But you can change your clocks at a more convenient time (i.e. at bedtime the night before, or when you wake the following morning). Just remember that when you wake up, businesses and schools will have changed their clocks and you will need to adjust your schedule accordingly.

Although most places in the United States observe daylight saving time, Hawaii and most of Arizona do not. The most recent state to begin using daylight saving time changes is Indiana (Indiana began using DST in 2006).

How to Change Your Clocks for Daylight Saving Time

Each year, the exact dates for instituting and ending DST change, based on these simple rules:

  • DST begins at 2 a.m. on the second Sunday of March and
  • DST ends at 2 a.m. on the first Sunday of November

To remember whether to push your clock ahead or back, you can use this mnemonic device:

  • "Spring" forward in the spring.
  • "Fall" back in the fall.

When Daylight Saving Time Begins: Reset your clocks one hour ahead of time on the second Sunday in March.

For example, at 2 a.m. you reset your clocks to 3 a.m. (You lose an hour of sleep.)

When Daylight Saving Time Ends: On the first Sunday in November, set your clock back one hour (you gain an extra hour of sleep.) For example, at 2 a.m., reset your clocks to 1 a.m.

When to Change Your Clocks for DST

This chart provides both past and future times for changing your clock.

Daylight Saving Time Calendar Dates
2006April 2October 29
2007March 11November 4
2008March 9November 2
2009March 8November 1
2010March 14November 7
2011March 13November 6
2012March 11November 4
2013March 10November 3
2014March 9November 2
2015March 8November 1
2016March 13November 6
2017March 12November 5
2018March 11November 4
2019March 10November 3


Learn to tell ​Military time

Time management skills.