Beware of the web!

Don't believe anything you read on the web or you receive in your electronic mail box without checking whatever you can verify. This morning, a friend of mine did broadcast an email message stating:
“This January is quite special, it counts:
5 Friday
5 Saturday
5 Sunday
This only happens every 823 years, etc.”

Before taking that information to the bank, I just checked and found out that instead of 5 Friday it was 5 Monday. Does that make the month of January 2011 unique? I don't think so; if you do, please a comment and explain why. Otherwise, make sure to always check the assertions you find on the web...