A Message from Princess Celestia

A Message from Princess Celestia is the twenty eighth episode of My Little Friendship.

Summary
Looks like Twilight has gotten the message from Princess Celestia. It seems that every pony wants Twilight and her friends to come back to the pony world because it has something to do with Luna, Celestia's sister. The letter also says that Twilight and her friends have to go back on Sunday, but there's a problem.