I've never time traveled before, but if I do travel forward to obtain something...

[aboyonceknown]

and then travel back to the correct date, will it make whatever I achieved or obtained be gone?

 

[Yggdrasil]

I only know that if you go backwards any turnips you have will rot, other than that I have no idea.

 

[Swiftstream]

No.

 

[budewarmin]

It won't be gone.

- - - Post Merge - - -

Be it items or achievements.