I have now attended 4 weddings as a sober señorita.  Before the first one I felt like it would be this big milestone. I felt like I had to inform everyone before I went. "Just so you guys know I will NOT be binge drinking & getting shitfaced at _____'s wedding like I normally do."  Although I guess it made more sense for my first sober wedding that I declare that because it was only after a month of sobriety for me.