Personalized National Wine Day T-Shirt. National Wine Day - Jan 1 - Dec 31. Wine Day should be any day that ends in y. Funny gift for your favorite wine lover! Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.