Here is how The week with Celestia goes in Stayin' with Celestia.
One day at Canterlot.
Princess Celestia: Don't worry about a thing, Luna, You and Hiro have a great time, I'll take very good care of Yuna and Snowdrop.
Princess Luna: I thank you, Sister.
Princess Celestia: See you two in a week!
Princess Yuna: Bye, Mama!, Bye, Papa!
Snowdrop: Bye, Luna! Bye, Hiro!
Hiro: You and Celestia take care, Dusty!
Dusty Crophopper: Will do, Hiro, Bye!