Oops, it doesn't look like 'mingles comeback mingles comeback day' is a national day..

Other days

healing

Healing Day

tell a fairytale

Tell A Fairytale Day

Emoji Day

buddy

Buddy Day

gum

Gum Day

self care

Self Care Day

slime

Slime Day

stress awareness

Stress Awareness Day

azonto is acceptable

Azonto Is Acceptable Day

reading

Reading Day