Oops, it doesn't look like 'chemistry week started out as a single day' is a national day..

Other days

My Little Pony Day

Slime Day

Kiss A Brunette Day

Tell A Fairytale Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Eat What You Want Day

Singles Day

Comfy Day

Stress Awareness Day

Aloxolt Day