Date Pattern Calculator

Palindrome and pattern dates

Some dates read the same backwards as forwards, or use a striking run of repeated or sequential digits. This date pattern calculator checks any date for these curiosities — palindromes in different formats, all-same digits, and sequential runs — and finds the next palindrome date after it.

Because a palindrome depends on the date format, the tool checks the common ones: DD/MM/YYYY, MM/DD/YYYY and the ISO YYYY-MM-DD. A date can be a palindrome in one format but not another.

Why people look for these

Pattern dates are memorable, so they're often chosen for weddings, launches and once-in-a-lifetime moments. They're also a fun bit of number play for any special day.

Other kinds of special dates

Palindromes are the best known, but people also hunt for repdigit dates where every figure is the same (11/11/11), sequential dates that count up (12/13/14), and dates that read the same turned upside down. These novelty dates are popular for weddings, product launches and once-in-a-lifetime announcements, which is why couples and marketers plan months ahead to land on one. Because the pattern depends on the format, a date that is striking as DD/MM/YYYY may look ordinary as MM/DD/YYYY, so it is always worth checking both.

Related tools

To find the weekday of a special date, use the day of the week calculator; to count down to it, the date difference calculator.