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

Other days

ruby

Ruby Day
carpenters

Carpenters Day
ormille

Ormille Day
reading

Reading Day
ask out your crush

Ask Out Your Crush Day
buddy

Buddy Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
tell a fairytale

Tell A Fairytale Day
my little pony

My Little Pony Day
offer

Offer Day