List of Special Days and National Days in June 2018. Dinosaur Day 2018 observed on Tuesday, May 15th and Friday, June 1st, 2018 National Doughnut Day 2018 is observed on Friday, June 1, 2018 Hug an Atheist Day 2018 is observed on Friday, June 1, 2018 National Leave the Office Early Day 2018 is observed […]