What Is the Pattern 8 5 4 9 1 7 6 3 2 0?

This pattern of numbers is an example of a non-mathematical sequence. Another type of similar sequence is 7, 8, 5, 5, 3, 4 and so forth, in which the numbers indicate the number of letters in each month of the year, and the order places them in chronological order. The sequence 31, 28, 31, 30 and so forth lists the number of days in each month in chronological order.