Tom has the White Stuff.
It's getting warmer as May approaches, so what better time to address one of the better-known Rules? Perhaps you already have a light-colored linen jacket or even a seersucker suit hanging in the closet, or maybe you're considering acquiring one for the rash of summer weddings. So when can you start using it?
Ask folks in different parts of the country when you can start wearing white suits, jackets, or shoes, and you'll get different answers. Up in New England, they'll tell you the rule is Memorial Day to Labor Day. Down South you'll hear it's proper from Easter until Labor Day-ish. Since we're in the Midwest, why not split the difference?
Let's remember this rule developed because these types of white clothing items were worn in the summer months for their cooling properties (besides the sunlight-reflecting properties of white materials, they also tend to be lighter and more breathable than winter-weight materials). Things start to warm up around here as May approaches, and since it splits the difference between Easter and Memorial Day as the Midwest splits North and South, May 1 serves as a good rule of thumb. The first warm spell following (say, 80+ degrees) would be a good opportunity to break out that white or natural linen jacket.
Let the origins of the rule also serve as your guide when it comes to summer wedding wear. Barring explicit instructions from the couple to the contrary, any outdoor summer wedding or reception, day or night, should be an appropriate venue for wearing your seersucker or linen.* After all, you'll be subject to the sun during the day or to the summer heat and humidity once the sun goes down. Indoor weddings and receptions during the day also tolerate lighter wear, as you'll be outside traveling to and between venues, and likely during portions of the events themselves. However, a late-afternoon-to-evening indoor wedding with indoor reception following often calls for a summer-weight darker wool suit, or perhaps a darker poplin suit.
Speaking of poplin, a khaki, tan, or olive cotton suit can be a great alternative for summer wear if you're not quite adventurous enough to go seersucker or white linen. Because it's not white, you can also get away with wearing such a suit earlier in the spring and later into the fall. Style Blogger had a recent post highlighting some good options, including cotton, linen, and seersucker suits, for summer weddings.
* The rule you may have heard relating to only the bride wearing white is applicable only to female guests. However, you should still be mindful of what the other guests are likely to be wearing. Courtesy dictates that you not dress in a manner so unlike the other guests that you draw attention away from the bride on her special day. On the other hand, weddings are one of the best remaining opportunities in our casual society to celebrate through your style, and well-dressed guests contribute to a classy celebration. So if the other male guests are likely to be wearing jackets but not linen or seersucker, go ahead and wear yours, but maybe tone it down a bit by wearing brown shoes and belt and a blue shirt, and forgoing the bow tie for a conservatively-patterned-and-colored regular tie. If it's a casual outdoor wedding, try wearing your jacket with a knit tie and jeans. As long as you stay within a half-step of formality of several other guests, you'll be fine.