| Eastern Time * | UTC ** | ||
| 1995 | |||
| Vernal Equinox | 3/20/95 21:14 | 3/21/95 2:14 | |
| First Third of Spring | 4/20/95 19:20 | 4/21/95 0:20 | |
| Mid-Spring | 5/6/95 7:24 | 5/6/95 11:24 | |
| Second Third of Spring | 5/21/95 18:27 | 5/21/95 22:27 | |
| Summer Solstice | 6/21/95 16:34 | 6/21/95 20:34 | |
| First Third of Summer | 7/22/95 21:47 | 7/23/95 1:47 | |
| Mid-Summer | 8/7/95 12:23 | 8/7/95 16:23 | |
| Second Third of Summer | 8/23/95 3:00 | 8/23/95 7:00 | |
| Autumnal Equinox | 9/23/95 8:13 | 9/23/95 12:13 | |
| First Third of Autumn | 10/23/95 6:54 | 10/23/95 10:54 | |
| Mid-Autumn | 11/7/95 5:15 | 11/7/95 10:15 | |
| Second Third of Autumn | 11/22/95 4:35 | 11/22/95 9:35 | |
| Winter Solstice | 12/22/95 3:17 | 12/22/95 8:17 | |
| 1996 | Eastern Time | UTC | |
| First Third of Winter | 1/20/96 19:12 | 1/21/96 0:12 | |
| Mid-Winter | 2/4/96 15:10 | 2/4/96 20:10 | |
| Second Third of Winter | 2/19/96 11:07 | 2/19/96 16:07 | |
| Vernal Equinox | 3/20/96 3:03 | 3/20/96 8:03 | |
| First Third of Spring | 4/20/96 1:10 | 4/20/96 6:10 | |
| Mid-Spring | 5/5/96 13:13 | 5/5/96 17:13 | |
| Second Third of Spring | 5/21/96 0:17 | 5/21/96 4:17 | |
| Summer Solstice | 6/20/96 22:24 | 6/21/96 2:24 | |
| First Third of Summer | 7/22/96 3:36 | 7/22/96 7:36 | |
| Mid-Summer | 8/6/96 18:12 | 8/6/96 22:12 | |
| Second Third of Summer | 8/22/96 8:48 | 8/22/96 12:48 | |
| Autumnal Equinox | 9/22/96 14:00 | 9/22/96 18:00 | |
| First Third of Autumn | 10/22/96 12:42 | 10/22/96 16:42 | |
| Mid-Autumn | 11/6/96 11:03 | 11/6/96 16:03 | |
| Second Third of Autumn | 11/21/96 10:24 | 11/21/96 15:24 | |
| Winter Solstice | 12/21/96 9:06 | 12/21/96 14:06 | |
| 1997 | Eastern Time | UTC | |
| First Third of Winter | 1/20/97 1:02 | 1/20/97 6:02 | |
| Mid-Winter | 2/3/97 21:00 | 2/4/97 2:00 | |
| Second Third of Winter | 2/18/97 16:58 | 2/18/97 21:58 | |
| Vernal Equinox | 3/20/97 8:55 | 3/20/97 13:55 | |
| First Third of Spring | 4/20/97 7:03 | 4/20/97 12:03 | |
| Mid-Spring | 5/5/97 19:07 | 5/5/97 23:07 | |
| Second Third of Spring | 5/21/97 6:11 | 5/21/97 10:11 | |
| Summer Solstice | 6/21/97 4:20 | 6/21/97 8:20 | |
| First Third of Summer | 7/22/97 9:32 | 7/22/97 13:32 | |
| Mid-Summer | 8/7/97 0:08 | 8/7/97 4:08 | |
| Second Third of Summer | 8/22/97 14:44 | 8/22/97 18:44 | |
| Autumnal Equinox | 9/22/97 19:56 | 9/22/97 23:56 | |
| First Third of Autumn | 10/22/97 18:39 | 10/22/97 22:39 | |
| Mid-Autumn | 11/6/97 17:01 | 11/6/97 22:01 | |
| Second Third of Autumn | 11/21/97 16:23 | 11/21/97 21:23 | |
| Winter Solstice | 12/21/97 15:07 | 12/21/97 20:07 | |
| 1998 | Eastern Time | UTC | |
| First Third of Winter | 1/20/98 7:03 | 1/20/98 12:03 | |
| Mid-Winter | 2/4/98 3:01 | 2/4/98 8:01 | |
| Second Third of Winter | 2/18/98 22:59 | 2/19/98 3:59 | |
| Vernal Equinox | 3/20/98 14:55 | 3/20/98 19:55 | |
| First Third of Spring | 4/20/98 12:57 | 4/20/98 17:57 | |
| Mid-Spring | 5/6/98 0:59 | 5/6/98 4:59 | |
| Second Third of Spring | 5/21/98 12:00 | 5/21/98 16:00 | |
| Summer Solstice | 6/21/98 10:03 | 6/21/98 14:03 | |
| First Third of Summer | 7/22/98 15:14 | 7/22/98 19:14 | |
| Mid-Summer | 8/7/98 5:50 | 8/7/98 9:50 | |
| Second Third of Summer | 8/22/98 20:25 | 8/23/98 0:25 | |
| Autumnal Equinox | 9/23/98 1:37 | 9/23/98 5:37 | |
| First Third of Autumn | 10/23/98 0:23 | 10/23/98 4:23 | |
| Mid-Autumn | 11/6/98 22:46 | 11/7/98 3:46 | |
| Second Third of Autumn | 11/21/98 22:09 | 11/22/98 3:09 | |
| Winter Solstice | 12/21/98 20:56 | 12/22/98 1:56 | |
| 1999 | Eastern Time | UTC | |
| First Third of Winter | 1/20/99 12:52 | 1/20/99 17:52 | |
| Mid-Winter | 2/4/99 8:51 | 2/4/99 13:51 | |
| Second Third of Winter | 2/19/99 4:49 | 2/19/99 9:49 | |
| Vernal Equinox | 3/20/99 20:46 | 3/21/99 1:46 | |
| First Third of Spring | 4/20/99 18:47 | 4/20/99 23:47 | |
| Mid-Spring | 5/6/99 6:47 | 5/6/99 10:47 | |
| Second Third of Spring | 5/21/99 17:48 | 5/21/99 21:48 | |
| Summer Solstice | 6/21/99 15:49 | 6/21/99 19:49 | |
| First Third of Summer | 7/22/99 21:03 | 7/23/99 1:03 | |
| Mid-Summer | 8/7/99 11:40 | 8/7/99 15:40 | |
| Second Third of Summer | 8/23/99 2:17 | 8/23/99 6:17 | |
| Autumnal Equinox | 9/23/99 7:31 | 9/23/99 11:31 | |
| First Third of Autumn | 10/23/99 6:15 | 10/23/99 10:15 | |
| Mid-Autumn | 11/7/99 4:37 | 11/7/99 9:37 | |
| Second Third of Autumn | 11/22/99 3:59 | 11/22/99 8:59 | |
| Winter Solstice | 12/22/99 2:44 | 12/22/99 7:44 | |
| 2000 | Eastern Time | UTC | |
| First Third of Winter | 1/20/00 18:41 | 1/20/00 23:41 | |
| Mid-Winter | 2/4/00 14:39 | 2/4/00 19:39 | |
| Second Third of Winter | 2/19/00 10:38 | 2/19/00 15:38 | |
| Vernal Equinox | 3/20/00 2:35 | 3/20/00 7:35 | |
| First Third of Spring | 4/20/00 0:39 | 4/20/00 5:39 | |
| Mid-Spring | 5/5/00 12:41 | 5/5/00 16:41 | |
| Second Third of Spring | 5/20/00 23:43 | 5/21/00 3:43 | |
| Summer Solstice | 6/20/00 21:48 | 6/21/00 1:48 | |
| First Third of Summer | 7/22/00 3:01 | 7/22/00 7:01 | |
| Mid-Summer | 8/6/00 17:37 | 8/6/00 21:37 | |
| Second Third of Summer | 8/22/00 8:14 | 8/22/00 12:14 | |
| Autumnal Equinox | 9/22/00 13:27 | 9/22/00 17:27 | |
| First Third of Autumn | 10/22/00 12:10 | 10/22/00 16:10 | |
| Mid-Autumn | 11/6/00 10:32 | 11/6/00 15:32 | |
| Second Third of Autumn | 11/21/00 9:53 | 11/21/00 14:53 | |
| Winter Solstice | 12/21/00 8:37 | 12/21/00 13:37 | |
| 2001 | Eastern Time | UTC | |
| First Third of Winter | 1/20/01 0:35 | 1/20/01 5:35 | |
| Mid-Winter | 2/3/01 20:34 | 2/4/01 1:34 | |
| Second Third of Winter | 2/18/01 16:33 | 2/18/01 21:33 | |
| Vernal Equinox | 3/20/01 8:31 | 3/20/01 13:31 | |
| First Third of Spring | 4/20/01 6:33 | 4/20/01 11:33 | |
| Mid-Spring | 5/5/01 18:34 | 5/5/01 22:34 | |
| Second Third of Spring | 5/21/01 5:35 | 5/21/01 9:35 | |
| Summer Solstice | 6/21/01 3:38 | 6/21/01 7:38 | |
| First Third of Summer | 7/22/01 8:47 | 7/22/01 12:47 | |
| Mid-Summer | 8/6/01 23:21 | 8/7/01 3:21 | |
| Second Third of Summer | 8/22/01 13:56 | 8/22/01 17:56 | |
| Autumnal Equinox | 9/22/01 19:05 | 9/22/01 23:05 | |
| First Third of Autumn | 10/22/01 17:50 | 10/22/01 21:50 | |
| Mid-Autumn | 11/6/01 16:13 | 11/6/01 21:13 | |
| Second Third of Autumn | 11/21/01 15:36 | 11/21/01 20:36 | |
| Winter Solstice | 12/21/01 14:22 | 12/21/01 19:22 | |
| 2002 | Eastern Time | UTC | |
| First Third of Winter | 1/20/02 6:20 | 1/20/02 11:20 | |
| Mid-Winter | 2/4/02 2:19 | 2/4/02 7:19 | |
| Second Third of Winter | 2/18/02 22:18 | 2/19/02 3:18 | |
| Vernal Equinox | 3/20/02 14:16 | 3/20/02 19:16 | |
| First Third of Spring | 4/20/02 12:18 | 4/20/02 17:18 | |
| Mid-Spring | 5/6/02 0:20 | 5/6/02 4:20 | |
| Second Third of Spring | 5/21/02 11:21 | 5/21/02 15:21 | |
| Summer Solstice | 6/21/02 9:24 | 6/21/02 13:24 | |
| First Third of Summer | 7/22/02 14:34 | 7/22/02 18:34 | |
| Mid-Summer | 8/7/02 5:10 | 8/7/02 9:10 | |
| Second Third of Summer | 8/22/02 19:45 | 8/22/02 23:45 | |
| Autumnal Equinox | 9/23/02 0:56 | 9/23/02 4:56 | |
| First Third of Autumn | 10/22/02 23:42 | 10/23/02 3:42 | |
| Mid-Autumn | 11/6/02 22:05 | 11/7/02 3:05 | |
| Second Third of Autumn | 11/21/02 21:28 | 11/22/02 2:28 | |
| Winter Solstice | 12/21/02 20:15 | 12/22/02 1:15 | |
| 2003 | Eastern Time | UTC | |
| First Third of Winter | 1/20/03 12:10 | 1/20/03 17:10 | |
| Mid-Winter | 2/4/03 8:07 | 2/4/03 13:07 | |
| Second Third of Winter | 2/19/03 4:05 | 2/19/03 9:05 | |
| Vernal Equinox | 3/20/03 20:00 | 3/21/03 1:00 | |
| First Third of Spring | 4/20/03 18:03 | 4/20/03 23:03 | |
| Mid-Spring | 5/6/03 6:05 | 5/6/03 10:05 | |
| Second Third of Spring | 5/21/03 17:06 | 5/21/03 21:06 | |
| Summer Solstice | 6/21/03 15:10 | 6/21/03 19:10 | |
| First Third of Summer | 7/22/03 20:22 | 7/23/03 0:22 | |
| Mid-Summer | 8/7/03 10:58 | 8/7/03 14:58 | |
| Second Third of Summer | 8/23/03 1:34 | 8/23/03 5:34 | |
| Autumnal Equinox | 9/23/03 6:47 | 9/23/03 10:47 | |
| First Third of Autumn | 10/23/03 5:32 | 10/23/03 9:32 | |
| Mid-Autumn | 11/7/03 3:55 | 11/7/03 8:55 | |
| Second Third of Autumn | 11/22/03 3:18 | 11/22/03 8:18 | |
| Winter Solstice | 12/22/03 2:04 | 12/22/03 7:04 | |
| 2004 | Eastern Time | UTC | |
| First Third of Winter | 1/20/04 17:59 | 1/20/04 22:59 | |
| Mid-Winter | 2/4/04 13:56 | 2/4/04 18:56 | |
| Second Third of Winter | 2/19/04 9:54 | 2/19/04 14:54 | |
| Vernal Equinox | 3/20/04 1:49 | 3/20/04 6:49 | |
| First Third of Spring | 4/19/04 23:51 | 4/20/04 4:51 | |
| Mid-Spring | 5/5/04 11:53 | 5/5/04 15:53 | |
| Second Third of Spring | 5/20/04 22:54 | 5/21/04 2:54 | |
| Summer Solstice | 6/20/04 20:57 | 6/21/04 0:57 | |
| First Third of Summer | 7/22/04 2:08 | 7/22/04 6:08 | |
| Mid-Summer | 8/6/04 16:43 | 8/6/04 20:43 | |
| Second Third of Summer | 8/22/04 7:19 | 8/22/04 11:19 | |
| Autumnal Equinox | 9/22/04 12:30 | 9/22/04 16:30 | |
| First Third of Autumn | 10/22/04 11:14 | 10/22/04 15:14 | |
| Mid-Autumn | 11/6/04 9:36 | 11/6/04 14:36 | |
| Second Third of Autumn | 11/21/04 8:58 | 11/21/04 13:58 | |
| Winter Solstice | 12/21/04 7:42 | 12/21/04 12:42 | |
| 2005 | Eastern Time | UTC | |
| First Third of Winter | 1/19/05 23:39 | 1/20/05 4:39 | |
| Mid-Winter | 2/3/05 19:38 | 2/4/05 0:38 | |
| Second Third of Winter | 2/18/05 15:36 | 2/18/05 20:36 | |
| Vernal Equinox | 3/20/05 7:34 | 3/20/05 12:34 | |
| First Third of Spring | 4/20/05 5:38 | 4/20/05 10:38 | |
| Mid-Spring | 5/5/05 17:40 | 5/5/05 21:40 | |
| Second Third of Spring | 5/21/05 4:42 | 5/21/05 8:42 | |
| Summer Solstice | 6/21/05 2:46 | 6/21/05 6:46 | |
| First Third of Summer | 7/22/05 7:58 | 7/22/05 11:58 | |
| Mid-Summer | 8/6/05 22:34 | 8/7/05 2:34 | |
| Second Third of Summer | 8/22/05 13:10 | 8/22/05 17:10 | |
| Autumnal Equinox | 9/22/05 18:23 | 9/22/05 22:23 | |
| First Third of Autumn | 10/22/05 17:07 | 10/22/05 21:07 | |
| Mid-Autumn | 11/6/05 15:29 | 11/6/05 20:29 | |
| Second Third of Autumn | 11/21/05 14:51 | 11/21/05 19:51 | |
| Winter Solstice | 12/21/05 13:35 | 12/21/05 18:35 | |
| 2006 | Eastern Time | UTC | |
| First Third of Winter | 1/20/06 5:32 | 1/20/06 10:32 | |
| Mid-Winter | 2/4/06 1:30 | 2/4/06 6:30 | |
| Second Third of Winter | 2/18/06 21:29 | 2/19/06 2:29 | |
| Vernal Equinox | 3/20/06 13:26 | 3/20/06 18:26 | |
| First Third of Spring | 4/20/06 12:26 | 4/20/06 16:26 | |
| Mid-Spring | 5/5/06 23:26 | 5/6/06 3:26 | |
| Second Third of Spring | 5/21/06 10:26 | 5/21/06 14:26 | |
| Summer Solstice | 6/21/06 8:26 | 6/21/06 12:26 | |
| First Third of Summer | 7/22/06 13:38 | 7/22/06 17:38 | |
| Mid-Summer | 8/7/06 4:14 | 8/7/06 8:14 | |
| Second Third of Summer | 8/22/06 18:50 | 8/22/06 22:50 | |
| Autumnal Equinox | 9/23/06 0:03 | 9/23/06 4:03 | |
| First Third of Autumn | 10/22/06 22:49 | 10/23/06 2:49 | |
| Mid-Autumn | 11/6/06 21:12 | 11/7/06 2:12 | |
| Second Third of Autumn | 11/21/06 20:35 | 11/22/06 1:35 | |
| Winter Solstice | 12/21/06 19:22 | 12/22/06 0:22 | |
| 2007 | Eastern Time | UTC | |
| First Third of Winter | 1/20/07 11:17 | 1/20/07 16:17 | |
| Mid-Winter | 2/4/07 7:14 | 2/4/07 12:14 | |
| Second Third of Winter | 2/19/07 3:12 | 2/19/07 8:12 | |
| Vernal Equinox | 3/20/07 20:07† | 3/21/07 0:07 | |
| First Third of Spring | 4/20/07 18:06 | 4/20/07 22:06 | |
| Mid-Spring | 5/6/07 5:06 | 5/6/07 9:06 | |
| Second Third of Spring | 5/21/07 16:06 | 5/21/07 20:06 | |
| Summer Solstice | 6/21/07 14:06 | 6/21/07 18:06 | |
| First Third of Summer | 7/22/07 19:21 | 7/22/07 23:21 | |
| Mid-Summer | 8/7/07 9:58 | 8/7/07 13:58 | |
| Second Third of Summer | 8/23/07 0:36 | 8/23/07 4:36 | |
| Autumnal Equinox | 9/23/07 5:51 | 9/23/07 9:51 | |
| First Third of Autumn | 10/23/07 4:36 | 10/23/07 8:36 | |
| Mid-Autumn | 11/7/07 2:59 | 11/7/07 7:59 | |
| Second Third of Autumn | 11/22/07 2:22 | 11/22/07 7:22 | |
| Winter Solstice | 12/22/07 1:08 | 12/22/07 6:08 | |
| 2008 | Eastern Time | UTC | |
| First Third of Winter | 1/20/08 17:01 | 1/20/08 22:01 | |
| Mid-Winter | 2/4/08 12:58 | 2/4/08 17:58 | |
| Second Third of Winter | 2/19/08 8:54 | 2/19/08 13:54 | |
| Vernal Equinox | 3/20/08 1:48 | 3/20/08 5:48 | |
| First Third of Spring | 4/19/08 23:51 | 4/20/08 3:51 | |
| Mid-Spring | 5/5/08 10:53 | 5/5/08 14:53 | |
| Second Third of Spring | 5/20/08 21:55 | 5/21/08 1:55 | |
| Summer Solstice | 6/20/08 19:59 | 6/20/08 23:59 | |
| First Third of Summer | 7/22/08 1:14 | 7/22/08 5:14 | |
| Mid-Summer | 8/6/08 15:51 | 8/6/08 19:51 | |
| Second Third of Summer | 8/22/08 6:29 | 8/22/08 10:29 | |
| Autumnal Equinox | 9/22/08 11:44 | 9/22/08 15:44 | |
| First Third of Autumn | 10/22/08 10:30 | 10/22/08 14:30 | |
| Mid-Autumn | 11/6/08 8:54 | 11/6/08 13:54 | |
| Second Third of Autumn | 11/21/08 8:17 | 11/21/08 13:17 | |
| Winter Solstice | 12/21/08 7:04 | 12/21/08 12:04 | |
| 2009 | Eastern Time | UTC | |
| First Third of Winter | 1/19/09 22:57 | 1/20/09 3:57 | |
| Mid-Winter | 2/3/09 18:54 | 2/3/09 23:54 | |
| Second Third of Winter | 2/18/09 14:50 | 2/18/09 19:50 | |
| Vernal Equinox | 3/20/09 7:44 | 3/20/09 11:44 | |
| First Third of Spring | 4/20/09 5:44 | 4/20/09 9:44 | |
| Mid-Spring | 5/5/09 16:44 | 5/5/09 20:44 | |
| Second Third of Spring | 5/21/09 3:44 | 5/21/09 7:44 | |
| Summer Solstice | 6/21/09 1:45 | 6/21/09 5:45 | |
| First Third of Summer | 7/22/09 6:56 | 7/22/09 10:56 | |
| Mid-Summer | 8/6/09 21:31 | 8/7/09 1:31 | |
| Second Third of Summer | 8/22/09 12:07 | 8/22/09 16:07 | |
| Autumnal Equinox | 9/22/09 17:18 | 9/22/09 21:18 | |
| First Third of Autumn | 10/22/09 16:07 | 10/22/09 20:07 | |
| Mid-Autumn | 11/6/09 14:32 | 11/6/09 19:32 | |
| Second Third of Autumn | 11/21/09 13:57 | 11/21/09 18:57 | |
| Winter Solstice | 12/21/09 12:47 | 12/21/09 17:47 | |
| 2010 | Eastern Time | UTC | |
| First Third of Winter | 1/20/10 4:42 | 1/20/10 9:42 | |
| Mid-Winter | 2/4/10 0:39 | 2/4/10 5:39 | |
| Second Third of Winter | 2/18/10 20:37 | 2/19/10 1:37 | |
| Vernal Equinox | 3/20/10 13:32 | 3/20/10 17:32 | |
| First Third of Spring | 4/20/10 11:30 | 4/20/10 15:30 | |
| Mid-Spring | 5/5/10 22:30 | 5/6/10 2:30 | |
| Second Third of Spring | 5/21/10 9:29 | 5/21/10 13:29 | |
| Summer Solstice | 6/21/10 7:28 | 6/21/10 11:28 | |
| First Third of Summer | 7/22/10 12:41 | 7/22/10 16:41 | |
| Mid-Summer | 8/7/10 3:18 | 8/7/10 7:18 | |
| Second Third of Summer | 8/22/10 17:55 | 8/22/10 21:55 | |
| Autumnal Equinox | 9/22/10 23:09 | 9/23/10 3:09 | |
| First Third of Autumn | 10/22/10 21:58 | 10/23/10 1:58 | |
| Mid-Autumn | 11/6/10 21:23 | 11/7/10 1:23 | |
| Second Third of Autumn | 11/21/10 19:48 | 11/22/10 0:48 | |
| Winter Solstice | 12/21/10 18:38 | 12/21/10 23:38 | |
| 2011 | Eastern Time | UTC | |
| First Third of Winter | 1/20/11 10:32 | 1/20/11 15:32 | |
| Mid-Winter | 2/4/11 6:29 | 2/4/11 11:29 | |
| Second Third of Winter | 2/19/11 2:26 | 2/19/11 7:26 | |
| Vernal Equinox | 3/20/11 19:21 | 3/20/11 23:21 | |
| First Third of Spring | 4/20/11 17:19 | 4/20/11 21:19 | |
| Mid-Spring | 5/6/11 4:18 | 5/6/11 8:18 | |
| Second Third of Spring | 5/21/11 15:17 | 5/21/11 19:17 | |
| Summer Solstice | 6/21/11 13:16 | 6/21/11 17:16 | |
| First Third of Summer | 7/22/11 18:32 | 7/22/11 22:32 | |
| Mid-Summer | 8/7/11 9:10 | 8/7/11 13:10 | |
| Second Third of Summer | 8/22/11 23:48 | 8/23/11 3:48 | |
| Autumnal Equinox | 9/23/11 5:04 | 9/23/11 9:04 | |
| First Third of Autumn | 10/23/11 3:52 | 10/23/11 7:52 | |
| Mid-Autumn | 11/7/11 2:17 | 11/7/11 7:17 | |
| Second Third of Autumn | 11/22/11 1:41 | 11/22/11 6:41 | |
| Winter Solstice | 12/22/11 0:30 | 12/22/11 5:30 | |
| 2012 | Eastern Time | UTC | |
| First Third of Winter | 1/20/12 16:24 | 1/20/12 21:24 | |
| Mid-Winter | 2/4/12 12:22 | 2/4/12 17:22 | |
| Second Third of Winter | 2/19/12 8:19 | 2/19/12 13:19 | |
| Vernal Equinox | 3/20/12 1:14 | 3/20/12 5:14 | |
| First Third of Spring | 4/19/12 23:12 | 4/20/12 3:12 | |
| Mid-Spring | 5/5/12 10:11 | 5/5/12 14:11 | |
| Second Third of Spring | 5/20/12 21:10 | 5/21/12 1:10 | |
| Summer Solstice | 6/20/12 19:09 | 6/20/12 23:09 | |
| First Third of Summer | 7/22/12 0:22 | 7/22/12 4:22 | |
| Mid-Summer | 8/6/12 14:59 | 8/6/12 18:59 | |
| Second Third of Summer | 8/22/12 5:35 | 8/22/12 9:35 | |
| Autumnal Equinox | 9/22/12 10:49 | 9/22/12 14:49 | |
| First Third of Autumn | 10/22/12 9:36 | 10/22/12 13:36 | |
| Mid-Autumn | 11/6/12 8:00 | 11/6/12 13:00 | |
| Second Third of Autumn | 11/21/12 7:23 | 11/21/12 12:23 | |
| Winter Solstice | 12/21/12 6:11 | 12/21/12 11:11 | |
| 2013 | Eastern Time | UTC | |
| First Third of Winter | 1/19/13 22:08 | 1/20/13 3:08 | |
| Mid-Winter | 2/3/13 18:06 | 2/3/13 23:06 | |
| Second Third of Winter | 2/18/13 14:05 | 2/18/13 19:05 | |
| Vernal Equinox | 3/20/13 7:02 | 3/20/13 11:02 | |
| First Third of Spring | 4/20/13 5:02 | 4/20/13 9:02 | |
| Mid-Spring | 5/5/13 16:03 | 5/5/13 20:03 | |
| Second Third of Spring | 5/21/13 3:03 | 5/21/13 7:03 | |
| Summer Solstice | 6/21/13 1:04 | 6/21/13 5:04 | |
| First Third of Summer | 7/22/13 6:17 | 7/22/13 10:17 | |
| Mid-Summer | 8/6/13 20:54 | 8/7/13 0:54 | |
| Second Third of Summer | 8/22/13 11:30 | 8/22/13 15:30 | |
| Autumnal Equinox | 9/22/13 16:44 | 9/22/13 20:44 | |
| First Third of Autumn | 10/22/13 15:33 | 10/22/13 19:33 | |
| Mid-Autumn | 11/6/13 13:57 | 11/6/13 18:57 | |
| Second Third of Autumn | 11/21/13 13:22 | 11/21/13 18:22 | |
| Winter Solstice | 12/21/13 12:11 | 12/21/13 17:11 | |
| 2014 | Eastern Time | UTC | |
| First Third of Winter | 1/20/14 4:06 | 1/20/14 9:06 | |
| Mid-Winter | 2/4/14 0:04 | 2/4/14 5:04 | |
| Second Third of Winter | 2/18/14 20:01 | 2/19/14 1:01 | |
| Vernal Equinox | 3/20/14 12:57 | 3/20/14 16:57 | |
| First Third of Spring | 4/20/14 10:55 | 4/20/14 14:55 | |
| Mid-Spring | 5/5/14 21:54 | 5/6/14 1:54 | |
| Second Third of Spring | 5/21/14 8:53 | 5/21/14 12:53 | |
| Summer Solstice | 6/21/14 6:51 | 6/21/14 10:51 | |
| First Third of Summer | 7/22/14 12:03 | 7/22/14 16:03 | |
| Mid-Summer | 8/7/14 2:40 | 8/7/14 6:40 | |
| Second Third of Summer | 8/22/14 17:16 | 8/22/14 21:16 | |
| Autumnal Equinox | 9/22/14 22:29 | 9/23/14 2:29 | |
| First Third of Autumn | 10/22/14 21:20 | 10/23/14 1:20 | |
| Mid-Autumn | 11/6/14 19:46 | 11/7/14 0:46 | |
| Second Third of Autumn | 11/21/14 19:11 | 11/22/14 0:11 | |
| Winter Solstice | 12/21/14 18:03 | 12/21/14 23:03 | |
| 2015 | Eastern Time | UTC | |
| First Third of Winter | 1/20/15 9:57 | 1/20/15 14:57 | |
| Mid-Winter | 2/4/15 5:54 | 2/4/15 10:54 | |
| Second Third of Winter | 2/19/15 1:51 | 2/19/15 6:51 | |
| Vernal Equinox | 3/20/15 18:45 | 3/20/15 22:45 | |
| First Third of Spring | 4/20/15 16:42 | 4/20/15 20:42 | |
| Mid-Spring | 5/6/15 3:41 | 5/6/15 7:41 | |
| Second Third of Spring | 5/21/15 14:40 | 5/21/15 18:40 | |
| Summer Solstice | 6/21/15 12:38 | 6/21/15 16:38 | |
| First Third of Summer | 7/22/15 17:52 | 7/22/15 21:52 | |
| Mid-Summer | 8/7/15 8:29 | 8/7/15 12:29 | |
| Second Third of Summer | 8/22/15 23:06 | 8/23/15 3:06 | |
| Autumnal Equinox | 9/23/15 4:20 | 9/23/15 8:20 | |
| First Third of Autumn | 10/23/15 3:09 | 10/23/15 7:09 | |
| Mid-Autumn | 11/7/15 1:34 | 11/7/15 6:34 | |
| Second Third of Autumn | 11/22/15 0:58 | 11/22/15 5:58 | |
| Winter Solstice | 12/21/15 23:48 | 12/22/15 4:48 | |
| 2016 | Eastern Time | UTC | |
| First Third of Winter | 1/20/16 15:42 | 1/20/16 20:42 | |
| Mid-Winter | 2/4/16 11:39 | 2/4/16 16:39 | |
| Second Third of Winter | 2/19/16 7:36 | 2/19/16 12:36 | |
| Vernal Equinox | 3/20/16 0:30 | 3/20/16 4:30 | |
| First Third of Spring | 4/19/16 22:31 | 4/20/16 2:31 | |
| Mid-Spring | 5/5/16 9:32 | 5/5/16 13:32 | |
| Second Third of Spring | 5/20/16 20:32 | 5/21/16 0:32 | |
| Summer Solstice | 6/20/16 18:34 | 6/20/16 22:34 | |
| First Third of Summer | 7/21/16 23:49 | 7/22/16 3:49 | |
| Mid-Summer | 8/6/16 14:27 | 8/6/16 18:27 | |
| Second Third of Summer | 8/22/16 5:05 | 8/22/16 9:05 | |
| Autumnal Equinox | 9/22/16 10:21 | 9/22/16 14:21 | |
| First Third of Autumn | 10/22/16 9:08 | 10/22/16 13:08 | |
| Mid-Autumn | 11/6/16 7:32 | 11/6/16 12:32 | |
| Second Third of Autumn | 11/21/16 6:56 | 11/21/16 11:56 | |
| Winter Solstice | 12/21/16 5:44 | 12/21/16 10:44 | |
| 2017 | Eastern Time | UTC | |
| First Third of Winter | 1/19/17 21:38 | 1/20/17 2:38 | |
| Mid-Winter | 2/3/17 17:36 | 2/3/17 22:36 | |
| Second Third of Winter | 2/18/17 13:33 | 2/18/17 18:33 | |
| Vernal Equinox | 3/20/17 6:28 | 3/20/17 10:28 | |
| First Third of Spring | 4/20/17 4:26 | 4/20/17 8:26 | |
| Mid-Spring | 5/5/17 15:26 | 5/5/17 19:26 | |
| Second Third of Spring | 5/21/17 2:25 | 5/21/17 6:25 | |
| Summer Solstice | 6/21/17 0:24 | 6/21/17 4:24 | |
| First Third of Summer | 7/22/17 5:36 | 7/22/17 9:36 | |
| Mid-Summer | 8/6/17 20:13 | 8/7/17 0:13 | |
| Second Third of Summer | 8/22/17 10:49 | 8/22/17 14:49 | |
| Autumnal Equinox | 9/22/17 16:02 | 9/22/17 20:02 | |
| First Third of Autumn | 10/22/17 14:50 | 10/22/17 18:50 | |
| Mid-Autumn | 11/6/17 13:15 | 11/6/17 18:15 | |
| Second Third of Autumn | 11/21/17 12:39 | 11/21/17 17:39 | |
| Winter Solstice | 12/21/17 11:28 | 12/21/17 16:28 | |
| 2018 | Eastern Time | UTC | |
| First Third of Winter | 1/20/18 3:23 | 1/20/18 8:23 | |
| Mid-Winter | 2/3/18 23:21 | 2/4/18 4:21 | |
| Second Third of Winter | 2/18/18 19:19 | 2/19/18 0:19 | |
| Vernal Equinox | 3/20/18 12:15 | 3/20/18 16:15 | |
| First Third of Spring | 4/20/18 10:12 | 4/20/18 14:12 | |
| Mid-Spring | 5/5/18 21:11 | 5/6/18 1:11 | |
| Second Third of Spring | 5/21/18 8:09 | 5/21/18 12:09 | |
| Summer Solstice | 6/21/18 6:07 | 6/21/18 10:07 | |
| First Third of Summer | 7/22/18 11:22 | 7/22/18 15:22 | |
| Mid-Summer | 8/7/18 2:00 | 8/7/18 6:00 | |
| Second Third of Summer | 8/22/18 16:38 | 8/22/18 20:38 | |
| Autumnal Equinox | 9/22/18 21:54 | 9/23/18 1:54 | |
| First Third of Autumn | 10/22/18 20:43 | 10/23/18 0:43 | |
| Mid-Autumn | 11/6/18 19:08 | 11/7/18 0:08 | |
| Second Third of Autumn | 11/21/18 18:32 | 11/21/18 23:32 | |
| Winter Solstice | 12/21/18 17:22 | 12/21/18 22:22 | |
| 2019 | Eastern Time | UTC | |
| First Third of Winter | 1/20/19 9:14 | 1/20/19 14:14 | |
| Mid-Winter | 2/4/19 5:10 | 2/4/19 10:10 | |
| Second Third of Winter | 2/19/19 1:06 | 2/19/19 6:06 | |
| Vernal Equinox | 3/20/19 17:58 | 3/20/19 21:58 | |
| First Third of Spring | 4/20/19 15:56 | 4/20/19 19:56 | |
| Mid-Spring | 5/6/19 2:56 | 5/6/19 6:56 | |
| Second Third of Spring | 5/21/19 13:55 | 5/21/19 17:55 | |
| Summer Solstice | 6/21/19 11:54 | 6/21/19 15:54 | |
| First Third of Summer | 7/22/19 17:12 | 7/22/19 21:12 | |
| Mid-Summer | 8/7/19 7:52 | 8/7/19 11:52 | |
| Second Third of Summer | 8/22/19 22:31 | 8/23/19 2:31 | |
| Autumnal Equinox | 9/23/19 3:50 | 9/23/19 7:50 | |
| First Third of Autumn | 10/23/19 2:39 | 10/23/19 6:39 | |
| Mid-Autumn | 11/7/19 1:04 | 11/7/19 6:04 | |
| Second Third of Autumn | 11/22/19 0:29 | 11/22/19 5:29 | |
| Winter Solstice | 12/21/19 23:19 | 12/22/19 4:19 | |
| 2020 | Eastern Time | UTC | |
| First Third of Winter | 1/20/20 15:09 | 1/20/20 20:09 | |
| Mid-Winter | 2/4/20 11:04 | 2/4/20 16:04 | |
| Second Third of Winter | 2/19/20 6:59 | 2/19/20 11:59 | |
| Vernal Equinox | 3/19/20 23:49 | 3/20/20 3:49 | |
| First Third of Spring | 4/19/20 21:47 | 4/20/20 1:47 | |
| Mid-Spring | 5/5/20 8:46 | 5/5/20 12:46 | |
| Second Third of Spring | 5/20/20 19:45 | 5/20/20 23:45 | |
| Summer Solstice | 6/20/20 17:43 | 6/20/20 21:43 | |
| First Third of Summer | 7/21/20 22:58 | 7/22/20 2:58 | |
| Mid-Summer | 8/6/20 13:36 | 8/6/20 17:36 | |
| Second Third of Summer | 8/22/20 4:14 | 8/22/20 8:14 | |
| Autumnal Equinox | 9/22/20 9:30 | 9/22/20 13:30 | |
| First Third of Autumn | 10/22/20 8:20 | 10/22/20 12:20 | |
| Mid-Autumn | 11/6/20 6:46 | 11/6/20 11:46 | |
| Second Third of Autumn | 11/21/20 6:11 | 11/21/20 11:11 | |
| Winter Solstice | 12/21/20 5:02 | 12/21/20 10:02 |
* The Eastern time zone readings are already adjusted for EDT or EST. Return.
**UTC is “Coordinated Universal Time,” the official time zone for the planet earth. It's what scientists, among others, use. Return.
†Starting in 2007, Daylight Saving Time is supposed to start on the second Sunday in March at 2:00 AM and end on the First Sunday of November at 2:00 AM. This is part of the Energy Policy Act of 2005. This will add an extra month of Daylight Saving Time to the calendar. Return
Sources: The dates and times for the solstices and equinoxes are from the United States Naval Observatory. I put all of them into a spreadsheet and calculated the mid and third season boundaries. All equinox and solstice times are ± 1 minute, and all of my calculated times are ± 2 minutes due to rounding.