Dash couldn't be more thankful for Pinkie. In fact, she'd gone and planned a big hearts and hooves day surprise for her, and she's gone over it in her head at least fifty times.
The actual surprise could wait, though- between being a wonderbolt and the coolest flyer ever, she had to postpone working on it to a later date.
She did that multiple times, in fact.
She might have forgotten about it until the very date, actually.
Cute.