Oops, it doesn't look like 'hope you have a good day' is a national day..

Other days

china

China Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
self appreciation

Self Appreciation Day
bounce

Bounce Day
youth

Youth Day
boy friend

Boy Friend Day
martini

Martini Day
pick me

Pick Me Day
stress awareness

Stress Awareness Day