Personalized planet earth earth day Maternity Shirts. Earth day is celebrated April 22 every day. show everyone that this year you are celebrating and helping to save the planet. Everyday should be earth day because the planet needs saving every day. 5.5 oz., 100% combed ringspun cotton jersey tee. taped neck. topstitching on collar. double-needle stitched sleeves and bottom hem. Available in sizes Small, Medium, Large and XL.