Catholic Wedding Invitations At A Traditional Catholic Wedding W/o Communion At 7pm, Do I Have To Wear A Long Dress??

At a traditional Catholic wedding w/o communion at 7pm, do I have to wear a long dress?? - catholic wedding invitations

I've never been in a Catholic wedding before .. Everything he says on the invitation is as follows:

"The traditional religious ceremony, without a community of 7-8. Cocktails Hour: 8-9. Reception: 9pm-12midnight: Cocktails Appetizers difficult, toast, cake, dance, and the countdown for the new year."

What brand of clothes? Can I wear a short dress / skirt ... so just above the knee or below the knee ... or does the length of the ankle? Does anybody know?