I'm sure that every year has its own interesting math. Here is 2011.
This year we experienced and are going to experience four unusual dates: 1/1/11, 1/11/11, 11/1/11, 11/11/11; that's not all ... take the last two digits of the year in which you were born; now add the age you will be this year, and the result will be 111 for everyone!
For example - if you were born in 1957, and 57 + 54 = 111
This year October will have 5 Sundays, 5 Mondays and 5 Saturdays.
This happens only every 823 years.
