Don't be rude Wednesday 

Common practice in New Zealand, observers of Don't be rude Wednesday refrain from saying offensive things to people on Wednesdays.

See also: Don't be a cunt Thursday, and Don't be racist Tuesday

Mate #1 "Fuck bro you need to get a life"

Mate #2 "Bit rude man, remember its what day it is"

Mate #1 "Oh shit sorry! Forgot about Don't be rude Wednesday"

Don't be rude Wednesday by Slippery Gypsy 69 September 9, 2013

I don't mean to be rude

I'm about to be rude, but I don't care, so brace yourself.

Person 1: I don't mean to be rude, but I completely hate you and wish you would burn in hell.

Person 2: WTF?

I don't mean to be rude by lynz87 August 23, 2011

I dont mean to be rude but 

A precursor to being intentionally rude.

I dont mean to be rude but you smell.

I dont mean to be rude but by menonot January 11, 2011