Oops, it doesn't look like 'tweet about clouds day' is a national day..

Other days

youth

Youth Day
cursing

Cursing Day
pampering

Pampering Day
lumpy rug

Lumpy Rug Day
bounce

Bounce Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
ruby

Ruby Day
stress awareness

Stress Awareness Day
chocolate milkshake

Chocolate Milkshake Day
comfy

Comfy Day