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Date Pattern Calculator

Want to know if the digits in a date are sequential, repetitive, or can be read the same way forwards and backwards? Use the Date Pattern Calculator to find out unique and interesting mathematical patterns in different date formats.

For more options including pattern type, date order and to include time select the Advanced options checkbox.

Select period to look for patterns in

Select date

16 patterns found for Sunday, December 11, 2016

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

Readable dateOrder of dateGrouped as dateGrouped as patternType
Dec 11 at 12:11:21 amMM-DD HH:MI:SS12-11 00:11:2112110-01121Palindrome (reverse)
Dec 11 at 12:21:11 amDD-MM HH:MI:SS11-12 00:21:1111120-02111Palindrome (reverse)
Dec 11, 2016 at 1:11:21 amMM-DD-YY H:MI:SS12-11-16 1:11:2112111-6-11121Palindrome (reverse)
Dec 11, 2016 at 1:21:11 amDD-MM-YY H:MI:SS11-12-16 1:21:1111121-6-12111Palindrome (reverse)
Dec 11 at 2:11:21 amMM-DD H:MI:SS12-11 2:11:21121-121-121Repeats 3 x 3
Dec 11 at 11:11:21 amMM-DD HH:MI:SS12-11 11:11:2112111-11121Palindrome (reverse)
Dec 11 at 11:21:11 amDD-MM HH:MI:SS11-12 11:21:1111121-12111Palindrome (reverse)
Dec 11 at 1 pmDD-MM HH11-12 1311-12-13Increasing numbers
Dec 11 at 1:14 pmDD-MM HH:MI11-12 13:1411-12-13-14Increasing numbers
Dec 11 at 1:14:15 pmDD-MM HH:MI:SS11-12 13:14:1511-12-13-14-15Increasing numbers
Dec 11 at 9:11 pmDD-MM HH:MI11-12 21:111112-2111Palindrome (reverse)
Dec 11 at 9 pmMM-DD HH12-11 21121-121Palindrome (reverse)
Dec 11 at 9 pmMM-DD HH12-11 21121-121Repeats 3 x 2
Dec 11 at 10:11:21 pmMM-DD HH:MI:SS12-11 22:11:2112112-21121Palindrome (reverse)
Dec 11 at 10:21:11 pmDD-MM HH:MI:SS11-12 22:21:1111122-22111Palindrome (reverse)
Dec 11DD-MM11-1211-12Increasing numbers

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.

Special Date Combinations

  1. Palindrome Day
  2. The 823 Years Myth
  3. 12/12/12
  4. 11/11/11
  5. 10/10/10
  6. Date Pattern Calculator

Special Calendar Dates


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