i day apparel makes a special Anniversary, Ceremony, Celebration | Party, Surprise, Pi Day, World Maths Day, National Sarcastic Awareness Month gift for mathematician, math geek, math teacher, math student who loves to do, learn, teach math and solves math problems by using math equations and numbers. This math lover | mathematics design is also available for home decors and accessories such as mugs, posters, canvas, stickers, phone cases, etc.