1.) Seems like many folks get the association with marijuana correct but are badly misinterpret the slang/context. Back in the late 80s and 90s a "Green
Day" was NOT a day spent smoking marijuana, it was the day AFTER a copious amount of weed/THC was consumed. When one awoke and was still high from the prior nights festivities, THAT was the "green day"...
2.) Green Day - A SoCal pop-
punk band which arose in the late 90s to capitalize off of the
punk revival launched by bands like Rancid, Dropkick Murphys, Pennywise, The Vandals, etc... Known for fast aggressive pop-
punk songs that sound vaguely like other songs and a primadonna front man who grossly overestimates his contributions to
rock history.
1.) "Dude... I was so baked last night... those edibles didn't help either. I feel all dizzy and can't form thoughts"
"Ahhh, no worries
bro, you're just having a green day"
2.) "Hey, did you ever see Green Day back in the day?"
"Nah man, I don't do pop-
punk, I vastly prefer The Misfits,
Nirvana, Soundgarden, Alice in Chains, yknow...?"