I've ordered a red dress to a wedding I'm going to next month and I shown a family member today who said you're not supposed to wear red to weddings as its bad luck?
Apparently I can wear it to the night part but to the daytime it's a bit of a no no
I didn't know this 
They also have it available in nude or a sage green, would I be best ordering one of those colours instead?
Is this 'rule' widely known?