Orlando, FL Daylight Saving Time is observed from 4 April through 30 October. The first table shows how the monthly and yearly average sunrise and sunset times are affected by DST, and how they would be affected if DST were observed all year round. Table 1: Average sunrise and sunset times STD/DST STD year round DST year round Rise Set Rise Set Rise Set JAN 7:18 17:52 7:18 17:52 8:18 18:52 FEB 7:04 18:15 7:04 18:15 8:04 19:15 MAR 6:35 18:35 6:35 18:35 7:35 19:35 APR 6:54 19:46 6:00 18:52 7:00 19:52 MAY 6:35 20:09 5:35 19:09 6:35 20:09 JUN 6:28 20:24 5:28 19:24 6:28 20:24 JUL 6:38 20:24 5:38 19:24 6:38 20:24 AUG 6:55 20:03 5:55 19:03 6:55 20:03 SEP 7:11 19:30 6:11 18:30 7:11 19:30 OCT 7:25 18:54 6:27 17:56 7:27 18:56 NOV 6:48 17:33 6:48 17:33 7:48 18:33 DEC 7:10 17:32 7:10 17:32 8:10 18:32 1999 6:55 19:05 6:21 18:30 7:21 19:30 The column "STD/DST" shows DST observed from 4 April through 30 October and Standard Time observed during the rest of the year. The meanings of the "STD year round" and "DST year round" columns are obvious. DST does not make daylight hours as such any longer or shorter. (Small variations in Table 1 are due to numerical rounding.) However, it may lengthen or shorten the daylight hours available to specific individuals. The three tables below show the average daylight duration for persons with different waking hours. Table 2: Average daylight duration for waking hours 5:00 - 21:00 STD/DST STD year round DST year round JAN 10:34 10:34 10:34 FEB 11:12 11:12 11:12 MAR 12:00 12:00 12:00 APR 12:51 12:51 12:51 MAY 13:34 13:34 13:34 JUN 13:56 13:56 13:56 JUL 13:45 13:45 13:45 AUG 13:08 13:08 13:08 SEP 12:20 12:20 12:20 OCT 11:28 11:28 11:28 NOV 10:44 10:44 10:44 DEC 10:22 10:22 10:22 1999 12:10 12:10 12:10 Table 3: Average daylight duration for waking hours 6:30 - 22:30 STD/DST STD year round DST year round JAN 10:34 10:34 10:34 FEB 11:12 11:12 11:12 MAR 11:58 11:58 12:00 APR 12:50 12:22 12:51 MAY 13:34 12:39 13:34 JUN 13:54 12:54 13:54 JUL 13:45 12:54 13:45 AUG 13:08 12:33 13:08 SEP 12:20 12:00 12:20 OCT 11:28 11:24 11:28 NOV 10:44 10:44 10:44 DEC 10:22 10:22 10:22 1999 12:09 11:48 12:10 Table 4: Average daylight duration for waking hours 8:00 - 24:00 STD/DST STD year round DST year round JAN 9:52 9:52 10:34 FEB 10:15 10:15 11:10 MAR 10:35 10:35 11:35 APR 11:46 10:52 11:52 MAY 12:09 11:09 12:09 JUN 12:24 11:24 12:24 JUL 12:24 11:24 12:24 AUG 12:03 11:03 12:03 SEP 11:30 10:30 11:30 OCT 10:54 9:56 10:56 NOV 9:33 9:33 10:33 DEC 9:32 9:32 10:22 1999 11:05 10:30 11:28