Popsugar Fashion Kate Middleton The Royal Dress Code Rules There Are Very Specific Rules When It Comes to Dressing For the Royal Calendar June 25, 2017 by Marcia Moody View On One Page Photo 22 of 22 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 22 Trooping the Colour — June Women: Formal daywear with a hat. Men: Military attire. For the first time this year, Prince Philip wore a suit due to his age and the heat. (Military uniforms are notoriously heavy and hot.) Previous Next Start Slideshow The RoyalsKate MiddletonThe British Royals