Personalized Owl 100 Days 1st Grade Women's T-Shirt. Funny 100th Day of School Women's T-Shirt - White for grade school teachers and students with 3 cute owls on a yellow ruler says 100th DAY OF 1st Grade. Celebrate being 100 days smarter. Classic ladies' styling with a feminine neckline, sleeves and fit. 5.0 oz., pre-shrunk 100% cotton. Double-needle stitching throughout