I leave you with, arguably, the 3 biggest events in United States history over the last 50 years. (And they all scream ELEVEN! - no word addition necessary.) 
#1 John F. Kennedy assassination on the 33rd parallel, the 22nd day, of the 11th month of 1963.
1963 is not a multiple of 11. JFK was the 35th president, not a multiple of 11. He was 46 years old, not a multiple of 11. He was born May 29, 1917, no 11s. He was not 11 feet tall.
#2 Apollo 11 Lunar Landing, 1969.
And you didn't even note that 1969 IS a multiple of 11.
#3 9/11 terrorist attacks, 2001.
9 is not a multiple of 11
2001 is not a multiple of 11
And, this cannot be considered a coincidence anyway since the attackers picked the date using numerology. Actually, they based it on our emergency phone number 911, which happens NOT to be a multiple of 11.
Further, the calendar is arbitrary. Why don't we start January on the first day of winter, for example? Why even have 12 months? If we want 12 months, why give them the numbers of days they have. Wouldn't it make more sense to alternate and have 5 months with 31 and 7 with 30 and none with 28? So, something like:
Jan 30
Feb 31
Mar 30
Apr 31
May 30
Jun 31
Jul 30
Aug 31
Sep 30
Oct 31
Nov 30
Dec 30 in most years 31 in leap years.
What would that do to all of the dates? How much would this all change with Jan 1 being where Dec 22 is now? Wouldn't that be less arbitrary?
What about the year? We're 4 years off if we want to go by Christ's presumed year since the calculation was done incorrectly in the middle ages.
Why Christ anyway? There are older calendars. The Hebrew calendar has the year at 5772. The Chinese calendar at 4709.
Try going to this site and looking at today's date, or any of the dates in for which 11 is claimed to be an important number, in other calenders.
http://www.fourmilab.ch/documents/calendar/When you're done, I hope you'll agree that the only 11 in your last examples was Apollo 11. Actually though, there might be one more hiding in the double L of Apollo.
Whatever your cause, it’s a lost cause without population control. -- Paul Ehrlich
I refuse to believe corporations are people until Texas executes one. -- from moveon.org.