How do you acquire the “ Ride the Stick” goal celebration?

Its in the store, just keep checking back every day on reset. Also asking others to keep an eye out for you can help relieve the burden of doing it yourself.

Thanks alot ,  we will start looking more for it.  What do you exactly mean on "reset" ? 

There should be a clock inside the store with a countdown. Dont quote me but I think it resets around 8pm EST every night.

Currently in the store right now for me.

Thanks a lot , I checked yesterday morning and never saw it , I’ll look today. Im curious , is everybody’s store exactly the same all the time ? 

Usually they are the same. my friends and I all see the same stuff on the store. 

Found it yesterday . Thanks for all the help .