A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward. In other words, it remains unchanged when its characters are reversed. For example, ...

A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward. In other words, it remains unchanged when its characters are reversed. For example, ...

Corrections & Clarifications: An earlier version of this article misstated how frequently sets of palindrome dates occur. The next 10 days have a little treat in store. It's Palindrome Week, a week – ...