St. Patrick's Day Shirts - Keep Calm and Drink On Men's T-Shirt. Be Seen In Green This St. Patrick's Day! Here at GoneBlue we offer the biggest selection of fun St. Patrick's day t-shirt and novelties on the web! Choose from hundreds of Irish inspired St. Patrick's day designs for men and women. Whether you are looking for a new St. Patrick's day outfit or you are proud to be Irish 365 this shirt is sure to let every one know what your all about! Irish or not on St. Patrick's day everybody's Irish!