Date Pattern Calculator

Have you ever come across today’s date and realize that you can read it forward and backward or that it only consists of one repeating number?

The Date Pattern Calculator can help you discover all of the unique patterns that different calendar dates can form such as palindrome (reversible) dates and repeating number dates.

For more filter options select the “Advanced options” checkbox.

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Pattern types		Date order		Include time in pattern		Amount of patterns
AllRepetitiveReversible		All date ordersYear-Month-DayDay-Month-YearMonth-Day-Year		No timesHours onlyHours and minutesHours, minutes, seconds		NormalOnly good onesLook for more

205 patterns found for December 2012

Click on any row to see an animation of how the date pattern works

Readable date	Order of date	Grouped as date	Grouped as pattern	Type
Dec 1 at 12:11:20 AM	D-MM H:MI:SS	1-12 0:11:20	1120-1120	Repeats 4 x 2
Dec 1 at 12:12:10 AM	MM-D H:MI:SS	12-1 0:12:10	1210-1210	Repeats 4 x 2
Dec 1, 2012 at 12 AM	MM-DD-YYYY H	12-01-2012 0	120-120-120	Repeats 3 x 3
Dec 1 at 1:11:21 AM	D-MM H:MI:SS	1-12 1:11:21	1121-1121	Repeats 4 x 2
Dec 1, 2012 at 1:12:01 AM	MM-DD-YY HH:MI:SS	12-01-12 01:12:01	1201-1201-1201	Repeats 4 x 3
Dec 1 at 1:12:11 AM	MM-D H:MI:SS	12-1 1:12:11	1211-1211	Repeats 4 x 2
Dec 1, 2012 at 1:20 AM	MM-DD-YYYY HH:MI	12-01-2012 01:20	120-120-120-120	Repeats 3 x 4
Dec 1, 2012 at 1 AM	MM-DD-YY HH	12-01-12 01	1201-1201	Repeats 4 x 2
Dec 1, 2012 at 1 AM	MM-D-YY H	12-1-12 1	121-121	Repeats 3 x 2
Dec 1 at 2:11:22 AM	D-MM H:MI:SS	1-12 2:11:22	1122-1122	Repeats 4 x 2
Dec 1 at 2:12 AM	MM-D H:MI	12-1 2:12	12-12-12	Repeats 2 x 3
Dec 1 at 2:12:12 AM	MM-D H:MI:SS	12-1 2:12:12	12-12-12-12	Repeats 2 x 4
Dec 1 at 2 AM	MM-D H	12-1 2	12-12	Repeats 2 x 2
Dec 1 at 3:11:23 AM	D-MM H:MI:SS	1-12 3:11:23	1123-1123	Repeats 4 x 2
Dec 1 at 3:14:15 AM	MM-D H:MI:SS	12-1 3:14:15	12-13-14-15	Increasing numbers
Dec 1 at 4:11:24 AM	D-MM H:MI:SS	1-12 4:11:24	1124-1124	Repeats 4 x 2
Dec 1 at 4:12:14 AM	MM-D H:MI:SS	12-1 4:12:14	1214-1214	Repeats 4 x 2
Dec 1 at 5:11:25 AM	D-MM H:MI:SS	1-12 5:11:25	1125-1125	Repeats 4 x 2
Dec 1 at 5:12:15 AM	MM-D H:MI:SS	12-1 5:12:15	1215-1215	Repeats 4 x 2
Dec 1 at 6:11:26 AM	D-MM H:MI:SS	1-12 6:11:26	1126-1126	Repeats 4 x 2
Dec 1 at 6:12:16 AM	MM-D H:MI:SS	12-1 6:12:16	1216-1216	Repeats 4 x 2
Dec 1 at 7:11:27 AM	D-MM H:MI:SS	1-12 7:11:27	1127-1127	Repeats 4 x 2
Dec 1 at 7:12:17 AM	MM-D H:MI:SS	12-1 7:12:17	1217-1217	Repeats 4 x 2
Dec 1 at 8:11:28 AM	D-MM H:MI:SS	1-12 8:11:28	1128-1128	Repeats 4 x 2
Dec 1 at 8:12:18 AM	MM-D H:MI:SS	12-1 8:12:18	1218-1218	Repeats 4 x 2
Dec 1 at 9:11:29 AM	D-MM H:MI:SS	1-12 9:11:29	1129-1129	Repeats 4 x 2
Dec 1 at 9:12:19 AM	MM-D H:MI:SS	12-1 9:12:19	1219-1219	Repeats 4 x 2
Dec 1, 2012 at 11:21 AM	MM-D-YY HH:MI	12-1-12 11:21	121-121-121	Repeats 3 x 3
Dec 1, 2012 at 11:21 AM	MM-D-YY HH:MI	12-1-12 11:21	121-121-121	Repeats 3 x 3
Dec 1 at 12:11:21 PM	MM-D HH:MI:SS	12-1 12:11:21	121-121-121	Repeats 3 x 3
Dec 1 at 8 PM	MM-DD HH	12-01 20	120-120	Repeats 3 x 2
Dec 1	MM-D	12-1	1-2-1	Palindrome (reverse)
Dec 2 at 12:12:20 AM	MM-D H:MI:SS	12-2 0:12:20	1220-1220	Repeats 4 x 2
Dec 2 at 12:21:20 AM	D-MM H:MI:SS	2-12 0:21:20	2120-2120	Repeats 4 x 2
Dec 2 at 12:21:20 AM	DD-MM HH:MI:SS	02-12 00:21:20	02120-02120	Repeats 5 x 2
Dec 2 at 1 AM	D-MM H	2-12 1	21-21	Repeats 2 x 2
Dec 2 at 1:12:21 AM	MM-D H:MI:SS	12-2 1:12:21	1221-1221	Repeats 4 x 2
Dec 2, 2012 at 1 AM	D-MM-YY H	2-12-12 1	21-21-21	Repeats 2 x 3
Dec 2 at 1:21 AM	D-MM H:MI	2-12 1:21	21-21-21	Repeats 2 x 3
Dec 2, 2012 at 1:21 AM	D-MM-YY H:MI	2-12-12 1:21	21-21-21-21	Repeats 2 x 4
Dec 2 at 1:21:21 AM	D-MM H:MI:SS	2-12 1:21:21	21-21-21-21	Repeats 2 x 4
Dec 2, 2012 at 1:21:21 AM	D-MM-YY H:MI:SS	2-12-12 1:21:21	21-21-21-21-21	Repeats 2 x 5
Dec 2, 2012 at 2:12:02 AM	MM-DD-YY HH:MI:SS	12-02-12 02:12:02	1202-1202-1202	Repeats 4 x 3
Dec 2, 2012 at 2:12:12 AM	D-MM-YY H:MI:SS	2-12-12 2:12:12	21212-21212	Repeats 5 x 2
Dec 2 at 2:12:22 AM	MM-D H:MI:SS	12-2 2:12:22	1222-1222	Repeats 4 x 2
Dec 2, 2012 at 2 AM	MM-DD-YY HH	12-02-12 02	1202-1202	Repeats 4 x 2
Dec 2, 2012 at 2 AM	MM-D-YY H	12-2-12 2	122-122	Repeats 3 x 2
Dec 2 at 2:23:24 AM	D-MM H:MI:SS	2-12 2:23:24	21-22-23-24	Increasing numbers
Dec 2 at 3:12:23 AM	MM-D H:MI:SS	12-2 3:12:23	1223-1223	Repeats 4 x 2
Dec 2 at 3:21:23 AM	D-MM H:MI:SS	2-12 3:21:23	2123-2123	Repeats 4 x 2
Dec 2 at 4:12:24 AM	MM-D H:MI:SS	12-2 4:12:24	1224-1224	Repeats 4 x 2
Dec 2 at 4:21:24 AM	D-MM H:MI:SS	2-12 4:21:24	2124-2124	Repeats 4 x 2
Dec 2 at 5:12:25 AM	MM-D H:MI:SS	12-2 5:12:25	1225-1225	Repeats 4 x 2
Dec 2 at 5:21:25 AM	D-MM H:MI:SS	2-12 5:21:25	2125-2125	Repeats 4 x 2
Dec 2 at 6:12:26 AM	MM-D H:MI:SS	12-2 6:12:26	1226-1226	Repeats 4 x 2
Dec 2 at 6:21:26 AM	D-MM H:MI:SS	2-12 6:21:26	2126-2126	Repeats 4 x 2
Dec 2 at 7:12:27 AM	MM-D H:MI:SS	12-2 7:12:27	1227-1227	Repeats 4 x 2
Dec 2 at 7:21:27 AM	D-MM H:MI:SS	2-12 7:21:27	2127-2127	Repeats 4 x 2
Dec 2 at 8:12:28 AM	MM-D H:MI:SS	12-2 8:12:28	1228-1228	Repeats 4 x 2
Dec 2 at 8:21:28 AM	D-MM H:MI:SS	2-12 8:21:28	2128-2128	Repeats 4 x 2
Dec 2 at 9:12:29 AM	MM-D H:MI:SS	12-2 9:12:29	1229-1229	Repeats 4 x 2
Dec 2 at 9:21:29 AM	D-MM H:MI:SS	2-12 9:21:29	2129-2129	Repeats 4 x 2
Dec 2 at 11:20:21 AM	MM-DD HH:MI:SS	12-02 11:20:21	12021-12021	Repeats 5 x 2
Dec 2, 2012 at 9:22 PM	MM-D-YY HH:MI	12-2-12 21:22	122-122-122	Repeats 3 x 3
Dec 2 at 9:22:12 PM	D-MM HH:MI:SS	2-12 21:22:12	212-212-212	Repeats 3 x 3
Dec 2	D-MM	2-12	2-1-2	Palindrome (reverse)
Dec 2, 2012	D-MM-YY	2-12-12	21-2-12	Palindrome (reverse)
Dec 3 at 12:12:30 AM	MM-D H:MI:SS	12-3 0:12:30	1230-1230	Repeats 4 x 2
Dec 3 at 12:31:20 AM	D-MM H:MI:SS	3-12 0:31:20	3120-3120	Repeats 4 x 2
Dec 3 at 1:12:31 AM	MM-D H:MI:SS	12-3 1:12:31	1231-1231	Repeats 4 x 2
Dec 3 at 1:31:21 AM	D-MM H:MI:SS	3-12 1:31:21	3121-3121	Repeats 4 x 2
Dec 3 at 2:12:32 AM	MM-D H:MI:SS	12-3 2:12:32	1232-1232	Repeats 4 x 2
Dec 3 at 2:31:22 AM	D-MM H:MI:SS	3-12 2:31:22	3122-3122	Repeats 4 x 2
Dec 3, 2012 at 3:12:03 AM	MM-DD-YY HH:MI:SS	12-03-12 03:12:03	1203-1203-1203	Repeats 4 x 3
Dec 3 at 3:12:33 AM	MM-D H:MI:SS	12-3 3:12:33	1233-1233	Repeats 4 x 2
Dec 3, 2012 at 3 AM	MM-D-YY H	12-3-12 3	123-123	Repeats 3 x 2
Dec 3, 2012 at 3 AM	MM-DD-YY HH	12-03-12 03	1203-1203	Repeats 4 x 2
Dec 3 at 3:31:23 AM	D-MM H:MI:SS	3-12 3:31:23	3123-3123	Repeats 4 x 2
Dec 3 at 4:31:24 AM	D-MM H:MI:SS	3-12 4:31:24	3124-3124	Repeats 4 x 2
Dec 3 at 5:12:35 AM	MM-D H:MI:SS	12-3 5:12:35	1235-1235	Repeats 4 x 2
Dec 3 at 5:31:25 AM	D-MM H:MI:SS	3-12 5:31:25	3125-3125	Repeats 4 x 2
Dec 3 at 6:12:36 AM	MM-D H:MI:SS	12-3 6:12:36	1236-1236	Repeats 4 x 2
Dec 3 at 6:31:26 AM	D-MM H:MI:SS	3-12 6:31:26	3126-3126	Repeats 4 x 2
Dec 3 at 7:12:37 AM	MM-D H:MI:SS	12-3 7:12:37	1237-1237	Repeats 4 x 2
Dec 3 at 7:31:27 AM	D-MM H:MI:SS	3-12 7:31:27	3127-3127	Repeats 4 x 2
Dec 3 at 8:12:38 AM	MM-D H:MI:SS	12-3 8:12:38	1238-1238	Repeats 4 x 2
Dec 3 at 8:31:28 AM	D-MM H:MI:SS	3-12 8:31:28	3128-3128	Repeats 4 x 2
Dec 3 at 9:12:39 AM	MM-D H:MI:SS	12-3 9:12:39	1239-1239	Repeats 4 x 2
Dec 3 at 9:31:29 AM	D-MM H:MI:SS	3-12 9:31:29	3129-3129	Repeats 4 x 2
Dec 3	MM-D	12-3	1-2-3	Increasing numbers
Dec 4 at 12:12:40 AM	MM-D H:MI:SS	12-4 0:12:40	1240-1240	Repeats 4 x 2
Dec 4 at 12:41:20 AM	D-MM H:MI:SS	4-12 0:41:20	4120-4120	Repeats 4 x 2
Dec 4 at 1:12:41 AM	MM-D H:MI:SS	12-4 1:12:41	1241-1241	Repeats 4 x 2
Dec 4 at 1:41:21 AM	D-MM H:MI:SS	4-12 1:41:21	4121-4121	Repeats 4 x 2
Dec 4 at 2:12:42 AM	MM-D H:MI:SS	12-4 2:12:42	1242-1242	Repeats 4 x 2
Dec 4 at 2:41:22 AM	D-MM H:MI:SS	4-12 2:41:22	4122-4122	Repeats 4 x 2
Dec 4 at 3:12:43 AM	MM-D H:MI:SS	12-4 3:12:43	1243-1243	Repeats 4 x 2
Dec 4 at 3:41:23 AM	D-MM H:MI:SS	4-12 3:41:23	4123-4123	Repeats 4 x 2
Dec 4, 2012 at 4:12:04 AM	MM-DD-YY HH:MI:SS	12-04-12 04:12:04	1204-1204-1204	Repeats 4 x 3
Dec 4 at 4:12:44 AM	MM-D H:MI:SS	12-4 4:12:44	1244-1244	Repeats 4 x 2
Dec 4, 2012 at 4 AM	MM-DD-YY HH	12-04-12 04	1204-1204	Repeats 4 x 2
Dec 4, 2012 at 4 AM	MM-D-YY H	12-4-12 4	124-124	Repeats 3 x 2
Dec 4 at 4:41:24 AM	D-MM H:MI:SS	4-12 4:41:24	4124-4124	Repeats 4 x 2
Dec 4 at 5:12:45 AM	MM-D H:MI:SS	12-4 5:12:45	1245-1245	Repeats 4 x 2
Dec 4 at 5:41:25 AM	D-MM H:MI:SS	4-12 5:41:25	4125-4125	Repeats 4 x 2
Dec 4 at 6:12:46 AM	MM-D H:MI:SS	12-4 6:12:46	1246-1246	Repeats 4 x 2
Dec 4 at 6:41:26 AM	D-MM H:MI:SS	4-12 6:41:26	4126-4126	Repeats 4 x 2
Dec 4 at 7:12:47 AM	MM-D H:MI:SS	12-4 7:12:47	1247-1247	Repeats 4 x 2
Dec 4 at 7:41:27 AM	D-MM H:MI:SS	4-12 7:41:27	4127-4127	Repeats 4 x 2
Dec 4 at 8:12:48 AM	MM-D H:MI:SS	12-4 8:12:48	1248-1248	Repeats 4 x 2
Dec 4 at 8:41:28 AM	D-MM H:MI:SS	4-12 8:41:28	4128-4128	Repeats 4 x 2
Dec 4 at 9:12:49 AM	MM-D H:MI:SS	12-4 9:12:49	1249-1249	Repeats 4 x 2
Dec 4 at 9:41:29 AM	D-MM H:MI:SS	4-12 9:41:29	4129-4129	Repeats 4 x 2
Dec 5 at 12:12:50 AM	MM-D H:MI:SS	12-5 0:12:50	1250-1250	Repeats 4 x 2
Dec 5 at 12:51:20 AM	D-MM H:MI:SS	5-12 0:51:20	5120-5120	Repeats 4 x 2
Dec 5 at 1:12:51 AM	MM-D H:MI:SS	12-5 1:12:51	1251-1251	Repeats 4 x 2
Dec 5 at 1:51:21 AM	D-MM H:MI:SS	5-12 1:51:21	5121-5121	Repeats 4 x 2
Dec 5 at 2:12:52 AM	MM-D H:MI:SS	12-5 2:12:52	1252-1252	Repeats 4 x 2
Dec 5 at 2:51:22 AM	D-MM H:MI:SS	5-12 2:51:22	5122-5122	Repeats 4 x 2
Dec 5 at 3:12:53 AM	MM-D H:MI:SS	12-5 3:12:53	1253-1253	Repeats 4 x 2
Dec 5 at 3:51:23 AM	D-MM H:MI:SS	5-12 3:51:23	5123-5123	Repeats 4 x 2
Dec 5 at 4:12:54 AM	MM-D H:MI:SS	12-5 4:12:54	1254-1254	Repeats 4 x 2
Dec 5 at 4:51:24 AM	D-MM H:MI:SS	5-12 4:51:24	5124-5124	Repeats 4 x 2
Dec 5, 2012 at 5:12:05 AM	MM-DD-YY HH:MI:SS	12-05-12 05:12:05	1205-1205-1205	Repeats 4 x 3
Dec 5 at 5:12:55 AM	MM-D H:MI:SS	12-5 5:12:55	1255-1255	Repeats 4 x 2
Dec 5, 2012 at 5 AM	MM-DD-YY HH	12-05-12 05	1205-1205	Repeats 4 x 2
Dec 5, 2012 at 5 AM	MM-D-YY H	12-5-12 5	125-125	Repeats 3 x 2
Dec 5 at 5:51:25 AM	D-MM H:MI:SS	5-12 5:51:25	5125-5125	Repeats 4 x 2
Dec 5 at 6:12:56 AM	MM-D H:MI:SS	12-5 6:12:56	1256-1256	Repeats 4 x 2
Dec 5 at 6:51:26 AM	D-MM H:MI:SS	5-12 6:51:26	5126-5126	Repeats 4 x 2
Dec 5 at 7:12:57 AM	MM-D H:MI:SS	12-5 7:12:57	1257-1257	Repeats 4 x 2
Dec 5 at 7:51:27 AM	D-MM H:MI:SS	5-12 7:51:27	5127-5127	Repeats 4 x 2
Dec 5 at 8:12:58 AM	MM-D H:MI:SS	12-5 8:12:58	1258-1258	Repeats 4 x 2
Dec 5 at 8:51:28 AM	D-MM H:MI:SS	5-12 8:51:28	5128-5128	Repeats 4 x 2
Dec 5 at 9:12:59 AM	MM-D H:MI:SS	12-5 9:12:59	1259-1259	Repeats 4 x 2
Dec 5 at 9:51:29 AM	D-MM H:MI:SS	5-12 9:51:29	5129-5129	Repeats 4 x 2
Dec 6, 2012 at 6:12:06 AM	MM-DD-YY HH:MI:SS	12-06-12 06:12:06	1206-1206-1206	Repeats 4 x 3
Dec 6, 2012 at 6 AM	MM-D-YY H	12-6-12 6	126-126	Repeats 3 x 2
Dec 6, 2012 at 6 AM	MM-DD-YY HH	12-06-12 06	1206-1206	Repeats 4 x 2
Dec 7, 2012 at 7:12:07 AM	MM-DD-YY HH:MI:SS	12-07-12 07:12:07	1207-1207-1207	Repeats 4 x 3
Dec 7, 2012 at 7 AM	MM-D-YY H	12-7-12 7	127-127	Repeats 3 x 2
Dec 7, 2012 at 7 AM	MM-DD-YY HH	12-07-12 07	1207-1207	Repeats 4 x 2
Dec 8, 2012 at 8:12:08 AM	MM-DD-YY HH:MI:SS	12-08-12 08:12:08	1208-1208-1208	Repeats 4 x 3
Dec 8, 2012 at 8 AM	MM-DD-YY HH	12-08-12 08	1208-1208	Repeats 4 x 2
Dec 8, 2012 at 8 AM	MM-D-YY H	12-8-12 8	128-128	Repeats 3 x 2
Dec 9, 2012 at 9:12:09 AM	MM-DD-YY HH:MI:SS	12-09-12 09:12:09	1209-1209-1209	Repeats 4 x 3
Dec 9, 2012 at 9 AM	MM-DD-YY HH	12-09-12 09	1209-1209	Repeats 4 x 2
Dec 9, 2012 at 9 AM	MM-D-YY H	12-9-12 9	129-129	Repeats 3 x 2
Dec 10, 2012 at 10:12:10 AM	MM-DD-YY HH:MI:SS	12-10-12 10:12:10	1210-1210-1210	Repeats 4 x 3
Dec 10, 2012 at 10 AM	MM-DD-YY HH	12-10-12 10	1210-1210	Repeats 4 x 2
Dec 11 at 2:11:21 AM	MM-DD H:MI:SS	12-11 2:11:21	121-121-121	Repeats 3 x 3
Dec 11, 2012 at 11:12:11 AM	MM-DD-YY HH:MI:SS	12-11-12 11:12:11	1211-1211-1211	Repeats 4 x 3
Dec 11, 2012 at 11 AM	MM-DD-YY HH	12-11-12 11	1211-1211	Repeats 4 x 2
Dec 11 at 1:14 PM	DD-MM HH:MI	11-12 13:14	11-12-13-14	Increasing numbers
Dec 11 at 1:14:15 PM	DD-MM HH:MI:SS	11-12 13:14:15	11-12-13-14-15	Increasing numbers
Dec 11 at 9 PM	MM-DD HH	12-11 21	121-121	Repeats 3 x 2
Dec 11, 2012 at 9:21 PM	YY-MM-DD HH:MI	12-12-11 21:21	12121-12121	Repeats 5 x 2
Dec 11	DD-MM	11-12	11-12	Increasing numbers
Dec 12 at 11:21:21 AM	MM-DD HH:MI:SS	12-12 11:21:21	12121-12121	Repeats 5 x 2
Dec 12, 2012 at 12 PM	YY-MM-DD HH	12-12-12 12	12-12-12-12	Repeats 2 x 4
Dec 12, 2012 at 12:12 PM	YY-MM-DD HH:MI	12-12-12 12:12	12-12-12-12-12	Repeats 2 x 5
Dec 12 at 12:12 PM	MM-DD HH:MI	12-12 12:12	12-12-12-12	Repeats 2 x 4
Dec 12, 2012 at 12:12:12 PM	YY-MM-DD HH:MI:SS	12-12-12 12:12:12	12-12-12-12-12-12	Repeats 2 x 6
Dec 12 at 12:12:12 PM	MM-DD HH:MI:SS	12-12 12:12:12	12-12-12-12-12	Repeats 2 x 5
Dec 12 at 12 PM	MM-DD HH	12-12 12	12-12-12	Repeats 2 x 3
Dec 12, 2012	YY-MM-DD	12-12-12	12-12-12	Repeats 2 x 3
Dec 12	MM-DD	12-12	12-12	Repeats 2 x 2
Dec 13, 2012 at 1:12:13 PM	MM-DD-YY HH:MI:SS	12-13-12 13:12:13	1213-1213-1213	Repeats 4 x 3
Dec 13, 2012 at 1 PM	MM-DD-YY HH	12-13-12 13	1213-1213	Repeats 4 x 2
Dec 13 at 2:15 PM	MM-DD HH:MI	12-13 14:15	12-13-14-15	Increasing numbers
Dec 13 at 2:15:16 PM	MM-DD HH:MI:SS	12-13 14:15:16	12-13-14-15-16	Increasing numbers
Dec 13	MM-DD	12-13	12-13	Increasing numbers
Dec 14, 2012 at 2:12:14 PM	MM-DD-YY HH:MI:SS	12-14-12 14:12:14	1214-1214-1214	Repeats 4 x 3
Dec 14, 2012 at 2 PM	MM-DD-YY HH	12-14-12 14	1214-1214	Repeats 4 x 2
Dec 15, 2012 at 3:12:15 PM	MM-DD-YY HH:MI:SS	12-15-12 15:12:15	1215-1215-1215	Repeats 4 x 3
Dec 15, 2012 at 3 PM	MM-DD-YY HH	12-15-12 15	1215-1215	Repeats 4 x 2
Dec 16, 2012 at 4:12:16 PM	MM-DD-YY HH:MI:SS	12-16-12 16:12:16	1216-1216-1216	Repeats 4 x 3
Dec 16, 2012 at 4 PM	MM-DD-YY HH	12-16-12 16	1216-1216	Repeats 4 x 2
Dec 17, 2012 at 5:12:17 PM	MM-DD-YY HH:MI:SS	12-17-12 17:12:17	1217-1217-1217	Repeats 4 x 3
Dec 17, 2012 at 5 PM	MM-DD-YY HH	12-17-12 17	1217-1217	Repeats 4 x 2
Dec 18, 2012 at 6:12:18 PM	MM-DD-YY HH:MI:SS	12-18-12 18:12:18	1218-1218-1218	Repeats 4 x 3
Dec 18, 2012 at 6 PM	MM-DD-YY HH	12-18-12 18	1218-1218	Repeats 4 x 2
Dec 19, 2012 at 7:12:19 PM	MM-DD-YY HH:MI:SS	12-19-12 19:12:19	1219-1219-1219	Repeats 4 x 3
Dec 19, 2012 at 7 PM	MM-DD-YY HH	12-19-12 19	1219-1219	Repeats 4 x 2
Dec 20 at 1 AM	DD-MM HH	20-12 01	201-201	Repeats 3 x 2
Dec 20, 2012 at 8:12 PM	DD-MM-YYYY HH:MI	20-12-2012 20:12	2012-2012-2012	Repeats 4 x 3
Dec 20, 2012 at 8:12:20 PM	MM-DD-YY HH:MI:SS	12-20-12 20:12:20	1220-1220-1220	Repeats 4 x 3
Dec 20, 2012 at 8 PM	MM-DD-YY HH	12-20-12 20	1220-1220	Repeats 4 x 2
Dec 20, 2012	DD-MM-YYYY	20-12-2012	2012-2012	Repeats 4 x 2
Dec 21 at 11 AM	DD-MM HH	21-12 11	211-211	Repeats 3 x 2
Dec 21 at 12:21 PM	MM-DD HH:MI	12-21 12:21	1221-1221	Repeats 4 x 2
Dec 21 at 9:12 PM	DD-MM HH:MI	21-12 21:12	2112-2112	Repeats 4 x 2
Dec 21, 2012 at 9:12:21 PM	MM-DD-YY HH:MI:SS	12-21-12 21:12:21	1221-1221-1221	Repeats 4 x 3
Dec 21, 2012 at 9 PM	MM-DD-YY HH	12-21-12 21	1221-1221	Repeats 4 x 2
Dec 21 at 10 PM	MM-DD HH	12-21 22	122-122	Repeats 3 x 2
Dec 21	MM-DD	12-21	12-21	Palindrome (reverse)
Dec 21	DD-MM	21-12	21-12	Palindrome (reverse)
Dec 22 at 11:22:21 AM	MM-DD HH:MI:SS	12-22 11:22:21	12221-12221	Repeats 5 x 2
Dec 22 at 9 PM	DD-MM HH	22-12 21	221-221	Repeats 3 x 2
Dec 22, 2012 at 10:12:22 PM	MM-DD-YY HH:MI:SS	12-22-12 22:12:22	1222-1222-1222	Repeats 4 x 3
Dec 22, 2012 at 10 PM	MM-DD-YY HH	12-22-12 22	1222-1222	Repeats 4 x 2
Dec 22 at 10:21:22 PM	DD-MM HH:MI:SS	22-12 22:21:22	22122-22122	Repeats 5 x 2
Dec 23, 2012 at 11:12:23 PM	MM-DD-YY HH:MI:SS	12-23-12 23:12:23	1223-1223-1223	Repeats 4 x 3
Dec 23, 2012 at 11 PM	MM-DD-YY HH	12-23-12 23	1223-1223	Repeats 4 x 2
Dec 31 at 11 PM	MM-DD HH	12-31 23	123-123	Repeats 3 x 2

The results table highlights the dates that are most interesting and easiest to read in green. The type of pattern shows whether the date is a reversible (palindrome) or repeatable date.