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1.
Awesome marathon concert that happens every EVEN year, not every year
"Did you go that 311 Day in 2005?"

"No, cuz it was in 2006 you fucking idiot"
by Drewcy September 05, 2006
188 80
 
2.
Actually, 311 day happens EVERY YEAR! but the 311 day concerts are every even year. Thanks for staying positive 311 fans!
"celebration of the band 311 every year is the real meaning of 311 day!"
by fan311 March 02, 2007
118 31
 
3.
Only the sickest day of the year which takes place every year on March 11 (3/11). This day commemorates the greatness of the band 311. On this day, people who love this band usually have a huge party, smoke tons of marijuana and have a fucking ill time while listening to their music.
Bato 1: Yo man, guess what this Saturday is!!
Bato 2: Hmm, I dunno what could it be?
Bato 1: Its 311 Day!!!!
Bato 2: Yo holy fuck, lets celebrate.
-I'll bring my bong, some beer, and some chicks.
by V-Po March 05, 2006
126 64
 
4.
march 11th. THE BEST DAY OF THE ENTIRE YEAR. the day to celebrate the band 311 in all their glory. every year on march llth this wonderous band plays in New Orleans. tie-dye shirts should totally be worn, and peace should be spread.
-ITS 311 DAY! We gotta go to New Orleans and see them play!
-in 2008, 311 day is also on fucking tuesday! So, it's two of the best days all in one!
by steven lebarron February 29, 2008
60 38