Day Light Savings & Seasons in USA CST and CDT

It has long been long that I wanted to figure out what Day Light Savings actually means!


Daylight Savings Time is Effective from Mar to Nov and varies from year to year.

Daylight Saving Time resumes at 2 a.m. on Sunday, March 10, 2013 in the United States. It will end on Sunday, November 3, 2013 at 2 a.m.

Winter and Fall can be read as "Spring forward, Fall back"

The phrase "Spring forward, Fall back" helps people remember how Daylight Saving Time affects their clocks. At 2 a.m. on the second Sunday in March, we set our clocks forward one hour ahead of Standard Time ("Spring forward," even though Spring doesn't begin until late March, over a week after the start of Daylight Saving Time).

They "Fall back" at 2 a.m. on the first Sunday in November by setting our clock back one hour and thus returning to Standard Time.


The change to Daylight Saving Time ostensibly allows us to use less energy in lighting our homes by taking advantage of the longer and later daylight hours.

During the eight-month period of Daylight Saving Time, the names of time in each of the time zones in the U.S. (map) change as well.

1. Eastern Standard Time (EST) becomes Eastern Daylight Time
2. Central Standard Time (CST) becomes Central Daylight Time (CDT)
3. Mountain Standard Time (MST) becomes Mountain Daylight Time (MDT)
4. Pacific Standard Time becomes Pacific Daylight Time (PDT), and so forth.

The Act extended Daylight Saving Time by four weeks from the second Sunday of March to the first Sunday of November, with the hope that it would save 10,000 barrels of oil each day through reduced use of power by businesses during daylight hours.

USA Seasons
Spring = late March, April, June, July
Summer= late July, August, September
Fall = late September, October, November, early December
Winter = late December, January, February, March

Source & Coutesy : http://geography.about.com/cs/daylightsavings/a/dst.htm