We show daylight length in Washington, District of Columbia during 2013 and the equinoxes and solstices. From June 1, 2013 until June 20, 2013, daylight becomes longer. From June 21, 2013 until December 21, 2013, daylight becomes shorter. From December 22, 2013 until May 31, 2014, daylight becomes longer.
We show the equation of time during 2013. In the graph, the day of the year in the x axis starting from January, and the difference between mean solar time and apparent solar time in the y axis.
The day with the highest negative value is Friday, September 13 2013.
The day with the highest positive value is Wednesday, June 5 2013.
Apparent solar time and mean solar time are of the same length on the following days of the year:
Time of sunrise, sunset, dawn and dusk in Washington, District of Columbia during 2013.