National Day was on October 1st every year.
National Day was established on October 1st, 1949.
I have no idea when National Tattoo Story Day 2015 was. It could be that it wasn't widely publicized or there wasn't a consistent date set across different areas. Try looking up tattoo enthusiast groups or blogs; they might have the details you're seeking.
I'm not sure when National Sad Story Day is. Maybe it's not a widely recognized or officially established day.
National Science Fiction Day in 2017 was on January 2nd.
National Science Fiction Day is usually celebrated on January 2nd. It's a day for fans of the genre to come together and enjoy all things related to science fiction.
National Science Fiction Day is typically celebrated on January 2nd.
National Tell a Story Day falls on April 27th. This special day encourages people to come together and tell stories to one another, passing on wisdom and entertainment.
National Comic Book Day is observed on the first Saturday of September. This special day offers fans an opportunity to enjoy and share their love for comic books.