Gather around ye olde calender folks! Look at two dates this month: 11/01/11 and 11/11/11. There are dates that will only come ONCE in a life time.
Next month: 12/10/11 (not perfect.. but you get the idea.
In 2012: 01/02/12 , 02/01/12, 10/11/12 , 12/12/12 and 12/21/12.
If we're here beyond the mayan calender fiasco in 2022: 02/02/22 and 02/22/22.
Some calender numbers are unique in human history as they always will be.
Whatever the date is for you personally, just be aware of it.
enjoy your week.