In measuring the passage of years, the designation Common Era is really just another name for Anno Domini - "In the year of our Lord". If you had the power to reform this system and see it generally accepted, what event would you propose for this designation to reference?
Suggestions will be added to the poll.
ADDENDUM
(Oops, adding more choices resets the vote. I won't do this too often in the future.)
This round's winner was...

The following options have been added:
Star Date ("SD") - uh...
Software timekeeping Epoch ("SE") - 110 years ago
Newton's Principia is published ("NP") - 323 years ago
Invention of Iron Swords ("FeS") - c. 2810 years ago
Since that Sargon dude ("FS") - 4280
Creation (...has widely been considered as a bad move; "BM") - 8014 years ago