Palindrome Date Finder
Enter any date to see whether it reads the same forwards and backwards in the date format you choose. The tool checks your date as a plain digit string, then finds the nearest palindrome before and after it, and lists the next 10 palindrome dates. Switch between US (MM/DD/YYYY), European (DD/MM/YYYY), ISO (YYYY/MM/DD), and their 6-digit short forms.
What is a palindrome date?
A palindrome date is a calendar date whose digits, when written in a specific format without separators, form a palindrome: a sequence that reads identically forwards and backwards. For example, February 2, 2020, written in US format MM/DD/YYYY, becomes the digit string 02022020, which is the same whether you read it left to right or right to left. The date format you choose matters enormously: a date that is a palindrome in European DD/MM/YYYY notation may not be one in US MM/DD/YYYY notation, and vice versa.
How this calculator works
Enter a date and choose a format. The tool zero-pads the day, month, and year to fill their positions, removes all separators, then checks whether the resulting string matches its own reversal. It also scans backward and forward day by day to find the nearest palindrome dates before and after your chosen date, and generates a list of the next 10 palindrome dates from that starting point. The 6-digit short formats (MM/DD/YY, DD/MM/YY, YY/MM/DD) produce palindromes much more often than the full 8-digit versions, so switching formats can reveal palindromes close to any date you try.
How rare are palindrome dates?
Rarity depends entirely on the format. In 8-digit formats such as MM/DD/YYYY, palindrome dates are extremely scarce: roughly 12 occur in the entire 21st century (2001-2100), and they are clustered around the early 2000s and early 2020s. The 6-digit short formats like MM/DD/YY produce palindromes more frequently because the shorter year field imposes fewer constraints. The universal palindrome date February 2, 2020 (02/02/2020) was notable because it formed an 8-digit palindrome simultaneously in both US and European formats, which happens only once every few centuries.
Why do different formats give different results?
Every date format rearranges the same three components (year, month, day) into a different order, which changes the digit string entirely. The string 02022020 (February 2, 2020 in MM/DD/YYYY) is a palindrome. The same date in ISO YYYYMMDD is 20200202, which is also a palindrome. In European DD/MM/YYYY it is 02022020 again, making February 2, 2020 a universal 8-digit palindrome across all three major formats. Most dates are not so cooperative: a date that forms a palindrome in one format typically fails in the others. The 6-digit formats use only the last two digits of the year, creating an entirely separate set of palindrome dates that cycle on a shorter pattern.
Notable palindrome dates in the 21st century
| Date | Format(s) |
|---|---|
| 10/02/2001 | MM/DD/YYYY |
| 01/02/2010 | DD/MM/YYYY |
| 11/02/2011 | MM/DD/YYYY |
| 02/11/2011 | DD/MM/YYYY |
| 02/02/2020 | Universal (all 8-digit formats) |
| 12/02/2021 | MM/DD/YYYY |
| 02/21/2020 | YYYY/MM/DD yields 02022020 palindrome on 2020-02-02 |
| 02/22/2022 | MM/DD/YYYY (Twosday) |
| 22/02/2022 | DD/MM/YYYY (Twosday EU) |
| 03/02/2030 | DD/MM/YYYY |
| 04/02/2040 | DD/MM/YYYY |
| 05/02/2050 | DD/MM/YYYY |
A selection of 8-digit palindrome dates from 2001 to 2100. The full century contains approximately 12 such dates across all formats.
Frequently asked questions
What is the next 8-digit palindrome date in US format?
Enter today's date with the MM/DD/YYYY format selected, and the "Next palindrome date" output will show the exact date. In the 2020s and 2030s, the next 8-digit US palindromes include dates such as December 2, 2021 (12/02/2021) and others in the mid-2020s. Use the schedule table below the result for the next 10 upcoming palindromes.
Was February 2, 2020 really a universal palindrome date?
Yes. Written as 02/02/2020 in either the US (MM/DD/YYYY) or European (DD/MM/YYYY) format, the digit string is 02022020, which reads the same forwards and backwards. In ISO 8601 (YYYYMMDD) it becomes 20200202, also a palindrome. This triple coincidence is exceptionally rare and will not recur for several centuries, which is why the date attracted widespread attention.
How do 6-digit palindrome dates differ from 8-digit ones?
Six-digit formats abbreviate the year to its last two digits (e.g. "25" for 2025). This shorter string has fewer constraints, so palindrome dates occur far more often, sometimes several times a decade. Eight-digit formats use all four year digits, making the pattern much harder to satisfy, which is why only around 12 such dates exist in the entire 21st century.
Does the day of the week matter?
No. A palindrome date is determined entirely by the digit sequence of the date in a given format. The day of the week has no bearing on whether the digits form a palindrome. However, you can see the day of the week for each upcoming palindrome in the schedule table.
Can a date be a palindrome in more than one format?
Yes, though it is unusual. February 2, 2020 is the most famous example: it is a palindrome in MM/DD/YYYY, DD/MM/YYYY, and YYYYMMDD simultaneously. You can check any date across all six formats by switching the format selector and re-reading the result each time.
Why does the tool zero-pad single-digit months and days?
Standard date formats require each component to occupy a fixed number of digits: two for the day, two for the month, and two or four for the year. Without zero-padding, the digit string would be a different length for single-digit days and months, making palindrome checking inconsistent. For example, February 2 becomes "02" not "2", so the string length is always 6 or 8 digits depending on the format chosen.