Like most things in life, timing is everything, especially when planning your wedding. When you have your wedding can impact your bottomline considerably, so be aware and choose your date with care.
Obviously, the more popular a time of year (May through October) or day of the week (Saturday), the more expensive it's going to be. First rule of economics is price = demand. Working inversely, a date less in demand is going to give you more savings. Nowhere is it written that you have to have your wedding on a Saturday in June. Nor do you have to have a dinner and dance. Be creative and do what feels right for you as a couple. Lunch, brunch, cocktails, a smattering of artisan cheeses paired with exquisite wines – a rubber chicken dinner accompanied by the Macarena does not a wedding make.
If most of your guests are local, why not consider a Thursday evening? People are less likely to 'party it up' (and rack up the bar bill) than they would on a Saturday night. Or maybe look at Sunday afternoon. Daytime weddings are great for frugal brides since, being shorter, you save money on everything from vendors to the bar bill. Have a lunch or brunch rather then a more expensive dinner and some nice background music rather than paying a DJ or band for hours of dance music.
And you definitely don't want to consider Christmas, New Year's, Thanksgiving, July 4 or Easter as possible dates. Would you want to work on a holiday? Neither do the vendors so you'll pay through the nose. Plus, most guests have other plans for those dates and travel costs as well as hotel pricing are usually higher than normal.
Be unique and don't be afraid to do something different. The way I see it, any day you get to marry your love muffin is a great one. And if you save money by choosing an 'undervalued' date, more power to you!