Problem with this group is, Cranky wouldn’t be in it, he didn’t move into Ponyville until months after the celebration

@Psychopomf  
Yeah I’d like to read that.

The only problem with this theory is…she still would have met the rest of the mane 6. Remember, she was being sent out to oversee preparations, and with the exception of Pinkie, they all were in charge of various things. AJ:Food, Dash:Weather, Rarity:Decor, Fluttershy:Music. When she got there wouldn’t have affected things other than in how far along the preparations were.
 
So the REAL question you need to ask is if an extra day in Ponyville for Pre-Elements Twilight might have driven her to homicide?

You know, I still wonder if they will reveal that Lyra has been having some Not As Important As The Elements But Still Great Adventures with her own group.
 
After all, she was in Canterlot at first like Twilight. Then she is in Ponyville and shows up whenever something is important. …In fact, she was even in Cloudsdale once or twice, meaning she knows the Cloudwalk spell.

@CEO_Gladstone  
That eagle snatched it up the next morning.

Let’s see. Cranky has been loyal to Matilda. Cheerilee is kind. Derpy can be laughter. So Bon Bon and Lyra get honest and generous.

cranky didn’t move there till season 2

She would still have to wait a day for Nightmare.

There would a bench conveniently outside the ruins of an ancient long abandoned castle? Wow, a day makes quite a difference indeed.