Tuesday is the first day of this century's final 10-day stretch of palindrome dates -- at least, in the United States. A palindrome is typically a word, such as the name Bob, that reads the same backward and forward. With dates, it occurs when the numerical signature of the day is symmetrical in the same way.
Because dates are formatted differently from country to country, not all dates that are palindromic in one format are palindrome days in another. In the United States, dates are generally expressed by month first, then day, then year. But many countries write the day first, then the month, then the year.
Tuesday is Sept. 10, 2019, which in the U.S. is written 9-10-19. Turn that around and look at it again: it's 91019 either way.
That same pattern will hold true for the next 10 days: