When you get home from church (or Temple, or Mosque, or whatever) on Sunday (or Friday, or Saturday, or whenever), immediately strip off your clothes and lay them gently on a chair or put them on a hanger. You could even run them through a freshening cycle in the dryer, but I never do. I'm too lazy-busy! Then, for the work day, pull them right back on. You could mix it up a little with a different sweater or accessory, or a different pair of shoes.
This works best, of course, if you don't work with people who attend your church.
(What I wore to church for Easter is pictured, but with a different sweater and a belt added. The skirt and belt are from H & M, the cardi is from NY & Co, the gold shell is from parts nonremembered. Heels from Candie's and bracelet from Black Swamp Arts Fest.)