Robin Williams famously commented that one of the ten best reasons to be an Episcopalian is that the church year is color-coded. (We're currently in the beginning of the long teaching cycle of the Ordinary season, so the color is green.)
One of my Facebook friends posted a picture of a church notice (probably fictional) that had a list of things one couldn't wear: No sandals, no shorts, no athletic wear, no earrings on men, etc. The Facebook post says, "Join us for our opening hymn, 'Just as I am.'" That item might be fictional, but I know of two different churches in town that turned away teenage visitors who were wearing T-shirts with rock band names. (What a great message to send to kids who are interested in learning about Jesus!)
On any given Sunday at St. Matthew's, you'll see a lot of people who are dressed up. Women no longer wear hats and gloves (that was part of my childhood culture), but you'll normally see me in a dress shirt and jacket. You'll also see Bob in a Hawaiian shirt, shorts, and sandals. Lots of T-shirts in the summer. (We're not air-conditioned.)
So what?One of the interesting things about the Episcopal Church is that we're very reluctant to tell you what to do, especially on what we'd call "peripheral" items. (T-shirt or tie? Long hair or short? Beard or not?) We tend to be very minimal in life-style rules, even rules that some would call "essential" to the matter of being a "respectable Christian" because those rules distract a person from the essential material of following Christ and doing good to our neighbor. What did Jesus say about smoking? About being gay? About transgendered people using public restrooms? Nothing? Really? Maybe those concerns aren't part of the core Christian message after all.
That's why I can wear my tie and jacket while Bob wears his Hawaiian shirt, and we never really ask whether our clothing says anything about our faith.