How long does a bride have to send her thank you notes for wedding gifts that were received before the wedding?

Thank you notes for gifts received before the wedding should go out within two weeks of their arrival. Besides the fact that it's good manners to respond promptly, there's a practical reason for this etiquette rule: finishing them now diminishes the stockpile of un-thanked gifts awaiting your return after the honeymoon. Since notes for gifts received on or after the wedding day should be sent within a month (here you get a little more time), you'll be thankful to have already handled the early arrivers.