Personalized 1st Dyngus Day Polish American Adult Sweatshirt. My 1st Dyngus Day Adult Sweatshirt - White with rooster design for celebrating this fun Polish American day after Easter holiday. Stay warm and stylish with this classic adult sweatshirt, perfect for everyday comfort. Crafted from soft, durable fabric, it features a relaxed fit for added coziness. Whether you’re lounging at home, running errands, or enjoying outdoor activities, this versatile sweatshirt is a wardrobe essential for any season.