Convert your shadow length (in "feet" of 1/6 your height) into time of day, for given date, latitude 45.0N, longitude 93.0W, in CST time zone. Leftmost shadow is at local noon, "dusk" at sunrise/set; 24-hour clock. Bold numbers on the date line are shadow lengths in "feet". [brackets] show the sun's declination (celestial latitude) on that date, and other numbers on its line are the sun's altitude above the horizon, in degrees.
1/01 14.78 14.9 15.6 18 22 28 37 50 70 dusk 12:15 11:54 11:22 10:36 9:58 9:27 9:03 8:44 8:29 7:55 noon 12:35 13:07 13:54 14:32 15:02 15:27 15:46 16:00 16:35
1/20 12.86 13 13.7 16 20 26 36 50 70 dusk 12:21 11:57 11:23 10:34 9:52 9:20 8:52 8:33 8:19 7:47 noon 12:45 13:20 14:09 14:50 15:23 15:50 16:10 16:23 16:56
2/08 10.31 10.4 11.2 13 18 25 35 50 70 dusk 12:25 12:02 11:16 10:30 9:31 8:54 8:28 8:09 7:56 7:26 noon 12:47 13:34 14:19 15:18 15:56 16:22 16:41 16:53 17:23
2/27 7.98 8.1 9 11 16 23 34 50 70 dusk 12:24 11:54 11:00 10:06 9:04 8:24 7:56 7:37 7:25 6:56 noon 12:54 13:48 14:41 15:44 16:23 16:52 17:11 17:23 17:51
3/18 6.13 6.26 7 9 14 20 30 50 70 dusk 12:19 11:47 10:54 9:50 8:38 7:58 7:26 7:01 6:50 6:22 noon 12:52 13:45 14:49 16:01 16:41 17:12 17:38 17:49 18:17
4/06 4.72 4.85 5.7 8 13 20 30 50 70 dusk 12:14 11:39 10:38 9:24 8:09 7:22 6:51 6:26 6:15 5:47 noon 12:50 13:51 15:05 16:20 17:07 17:38 18:03 18:14 18:42
4/25 3.68 3.8 4.7 7 12 20 30 50 70 dusk 12:10 11:36 10:29 9:10 7:47 6:51 6:20 5:55 5:44 5:15 noon 12:44 13:51 15:10 16:33 17:29 18:00 18:25 18:37 19:06
5/14 2.95 3.1 4 6 11 20 30 50 70 dusk 12:09 11:31 10:27 9:12 7:37 6:29 5:58 5:31 5:19 4:49 noon 12:47 13:51 15:06 16:41 17:49 18:20 18:46 18:58 19:29
6/02 2.52 2.65 3.5 6 10 20 30 50 70 dusk 12:09 11:35 10:32 8:58 7:38 6:16 5:44 5:17 5:05 4:33 noon 12:44 13:47 15:21 16:41 18:03 18:35 19:02 19:14 19:46
6/21 2.38 2.5 3.4 6 10 20 30 50 70 dusk 12:13 11:40 10:34 8:57 7:38 6:15 5:43 5:15 5:03 4:31 noon 12:46 13:52 15:29 16:49 18:11 18:43 19:11 19:23 19:56
7/10 2.53 2.66 3.6 6 10 20 30 50 70 dusk 12:16 11:42 10:34 9:05 7:45 6:23 5:51 5:24 5:12 4:40 noon 12:50 13:58 15:27 16:47 18:09 18:41 19:08 19:20 19:52
7/29 2.99 3.1 4 6 11 20 30 50 70 dusk 12:18 11:45 10:38 9:22 7:47 6:39 6:08 5:42 5:30 4:59 noon 12:50 13:58 15:14 16:49 17:56 18:28 18:54 19:06 19:36
8/17 3.72 3.85 4.7 7 12 20 30 50 70 dusk 12:15 11:39 10:36 9:16 7:53 6:57 6:26 6:01 5:49 5:20 noon 12:50 13:53 15:14 16:37 17:33 18:03 18:29 18:40 19:09
9/05 4.78 4.9 5.8 8 13 20 30 50 70 dusk 12:10 11:36 10:32 9:21 8:06 7:19 6:48 6:23 6:12 5:44 noon 12:45 13:48 14:59 16:15 17:02 17:32 17:57 18:08 18:36
9/24 6.17 6.3 7 9 14 20 33 50 70 dusk 12:04 11:31 10:40 9:36 8:23 7:43 7:06 6:46 6:35 6:07 noon 12:37 13:27 14:32 15:44 16:24 17:02 17:22 17:33 18:00
10/13 8.01 8.13 9 11 16 23 34 50 70 dusk 11:59 11:30 10:37 9:42 8:40 8:00 7:31 7:12 7:01 6:32 noon 12:28 13:21 14:15 15:18 15:58 16:27 16:46 16:57 17:26
11/01 10.27 10.4 11.2 13 18 25 35 50 70 dusk 11:56 11:29 10:45 10:00 9:02 8:24 7:58 7:39 7:27 6:57 noon 12:22 13:06 13:52 14:50 15:27 15:53 16:12 16:25 16:55
11/20 12.79 12.9 13.7 16 20 26 36 50 70 dusk 11:58 11:37 10:57 10:09 9:28 8:56 8:28 8:09 7:55 7:23 noon 12:19 12:59 13:47 14:28 15:01 15:28 15:47 16:01 16:33
12/09 14.74 14.8 15.6 17.6 21 28 37 50 70 dusk 12:04 11:50 11:10 10:30 9:54 9:16 8:52 8:33 8:18 7:44 noon 12:18 12:58 13:38 14:14 14:52 15:17 15:36 15:50 16:25
12/28 15.01 15.1 15.8 18 22 28 38 50 70 dusk 12:13 11:55 11:21 10:38 9:58 9:27 9:00 8:43 8:29 7:54 noon 12:30 13:04 13:47 14:27 14:58 15:25 15:42 15:56 16:31