Activity for Jess + Rri

What does each imply dress code wise? And what is the proper wording for asking guests? I'd rather not have jeans and t shirts as our wedding will be on the formal side, but i'm not expecting everyone in full-on suits either. Is it okay to have a...

My fiancé and I have chosen to get married on September 23rd if this year, which is a Wednesday. The date has a special significance to us, and a lot of vendors offer weekday discounts (which is an added bonus), but I'm worried about guests not...