March 2023
No. Su Mo Tu We Th Fr Sa
9 26 27 28 1 2 3 4
10 5 6 7 8 9 10 11
11 12 13 14 15 16 17 18
12 19 20 21 22 23 24 25
13 26 27 28 29 30 31 1
  • In 2023 year Daylight Saving Starts fell on
    second Sunday of March

Daylight Saving Starts dates in the following years:

Su Mo Tu We Th Fr Sa
Mar. 2025
9
Mar. 2026
8
Mar. 2027
14
Mar. 2028
12
Mar. 2029
11
The dates the holiday is observed are marked with a dotted line (applies to federal holidays). Date calculations are based on your computer's time.

Daylight Saving Starts 2023

Sunday, March 12 Clock

Daylight saving time (DST, also known as summer time) is the practice of advancing clocks by one hour (relative to the Standard Time) during summer months to make better use of daylight in the evening. The clocks are adjusted back in the autumn.

For example, if sun rises at 4:00 am and sets at 7:00 pm, by advancing the clocks we get 5:00 am and 8:00 pm, respectively. Hence we get an extra hour of daylight in the evening. Assuming most people wake up at 6:00 am or later they generally do not mind if the time of sunrise becomes 5:00 am instead of 4:00 am.

In the case of the United States the one-hour shift occurs at 2:00 am local time. In spring the clock advances from the last moment of 01:59 am to 03:00 am DST. In autumn the clock jumps backward from the last moment of 01:59 am DST to 01:00 am.