Explain this

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 - Harry was born in 1957, and 57 + 54 = 111

This is the year of Money!!!

This year October will have 5 Sundays, 5 Mondays and 5 Saturdays. 
This happens only every 823 years.