Effects of Daylight Saving Time
By
Noah Veltman
Showing the effect of Daylight Saving Time on actual daylight experienced.
Data is from 2013, sunrises/sunsets are from the
US Naval Observatory
.
Caveats:
Doesn't account for the fact that sunrise and sunset are gradual events, with durations that vary by season and latitude. Also not configured to allow for working the night shift or weird time entries, like being asleep but at work.
City
New York, NY
Los Angeles, CA
San Francisco, CA
Seattle, WA
Chicago, IL
Washington, DC
Miami, FL
Portland, OR
Las Vegas, NV
Denver, CO
Houston, TX
Dallas, TX
New Orleans, LA
Boston, MA
Philadelphia, PA
Atlanta, GA
Nashville, TN
Cleveland, OH
Charlotte, NC
Detroit, MI
Spokane, WA
Salt Lake City, UT
Awake from
12:00am
12:15am
12:30am
12:45am
1:00am
1:15am
1:30am
1:45am
2:00am
2:15am
2:30am
2:45am
3:00am
3:15am
3:30am
3:45am
4:00am
4:15am
4:30am
4:45am
5:00am
5:15am
5:30am
5:45am
6:00am
6:15am
6:30am
6:45am
7:00am
7:15am
7:30am
7:45am
8:00am
8:15am
8:30am
8:45am
9:00am
9:15am
9:30am
9:45am
10:00am
10:15am
10:30am
10:45am
11:00am
11:15am
11:30am
11:45am
12:00pm
12:15pm
12:30pm
12:45pm
1:00pm
1:15pm
1:30pm
1:45pm
2:00pm
2:15pm
2:30pm
2:45pm
3:00pm
3:15pm
3:30pm
3:45pm
4:00pm
4:15pm
4:30pm
4:45pm
5:00pm
5:15pm
5:30pm
5:45pm
6:00pm
6:15pm
6:30pm
6:45pm
7:00pm
7:15pm
7:30pm
7:45pm
8:00pm
8:15pm
8:30pm
8:45pm
9:00pm
9:15pm
9:30pm
9:45pm
10:00pm
10:15pm
10:30pm
10:45pm
11:00pm
11:15pm
11:30pm
11:45pm
12:00am
to
12:00am
12:15am
12:30am
12:45am
1:00am
1:15am
1:30am
1:45am
2:00am
2:15am
2:30am
2:45am
3:00am
3:15am
3:30am
3:45am
4:00am
4:15am
4:30am
4:45am
5:00am
5:15am
5:30am
5:45am
6:00am
6:15am
6:30am
6:45am
7:00am
7:15am
7:30am
7:45am
8:00am
8:15am
8:30am
8:45am
9:00am
9:15am
9:30am
9:45am
10:00am
10:15am
10:30am
10:45am
11:00am
11:15am
11:30am
11:45am
12:00pm
12:15pm
12:30pm
12:45pm
1:00pm
1:15pm
1:30pm
1:45pm
2:00pm
2:15pm
2:30pm
2:45pm
3:00pm
3:15pm
3:30pm
3:45pm
4:00pm
4:15pm
4:30pm
4:45pm
5:00pm
5:15pm
5:30pm
5:45pm
6:00pm
6:15pm
6:30pm
6:45pm
7:00pm
7:15pm
7:30pm
7:45pm
8:00pm
8:15pm
8:30pm
8:45pm
9:00pm
9:15pm
9:30pm
9:45pm
10:00pm
10:15pm
10:30pm
10:45pm
11:00pm
11:15pm
11:30pm
11:45pm
12:00am
Working from
12:00am
12:15am
12:30am
12:45am
1:00am
1:15am
1:30am
1:45am
2:00am
2:15am
2:30am
2:45am
3:00am
3:15am
3:30am
3:45am
4:00am
4:15am
4:30am
4:45am
5:00am
5:15am
5:30am
5:45am
6:00am
6:15am
6:30am
6:45am
7:00am
7:15am
7:30am
7:45am
8:00am
8:15am
8:30am
8:45am
9:00am
9:15am
9:30am
9:45am
10:00am
10:15am
10:30am
10:45am
11:00am
11:15am
11:30am
11:45am
12:00pm
12:15pm
12:30pm
12:45pm
1:00pm
1:15pm
1:30pm
1:45pm
2:00pm
2:15pm
2:30pm
2:45pm
3:00pm
3:15pm
3:30pm
3:45pm
4:00pm
4:15pm
4:30pm
4:45pm
5:00pm
5:15pm
5:30pm
5:45pm
6:00pm
6:15pm
6:30pm
6:45pm
7:00pm
7:15pm
7:30pm
7:45pm
8:00pm
8:15pm
8:30pm
8:45pm
9:00pm
9:15pm
9:30pm
9:45pm
10:00pm
10:15pm
10:30pm
10:45pm
11:00pm
11:15pm
11:30pm
11:45pm
12:00am
to
12:00am
12:15am
12:30am
12:45am
1:00am
1:15am
1:30am
1:45am
2:00am
2:15am
2:30am
2:45am
3:00am
3:15am
3:30am
3:45am
4:00am
4:15am
4:30am
4:45am
5:00am
5:15am
5:30am
5:45am
6:00am
6:15am
6:30am
6:45am
7:00am
7:15am
7:30am
7:45am
8:00am
8:15am
8:30am
8:45am
9:00am
9:15am
9:30am
9:45am
10:00am
10:15am
10:30am
10:45am
11:00am
11:15am
11:30am
11:45am
12:00pm
12:15pm
12:30pm
12:45pm
1:00pm
1:15pm
1:30pm
1:45pm
2:00pm
2:15pm
2:30pm
2:45pm
3:00pm
3:15pm
3:30pm
3:45pm
4:00pm
4:15pm
4:30pm
4:45pm
5:00pm
5:15pm
5:30pm
5:45pm
6:00pm
6:15pm
6:30pm
6:45pm
7:00pm
7:15pm
7:30pm
7:45pm
8:00pm
8:15pm
8:30pm
8:45pm
9:00pm
9:15pm
9:30pm
9:45pm
10:00pm
10:15pm
10:30pm
10:45pm
11:00pm
11:15pm
11:30pm
11:45pm
12:00am
With DST vs. Without
March 10, 2013 - November 2, 2013
Avg. waking hours of daylight
Avg. free hours of daylight (awake, not at work)
Days it's light when you wake up
Days it's light when you leave work