Things that don't make sence

[andrewslayor1]

Like in the Winter Wrap Up episode it says Ponyvill was started by earth ponies so in the old days how would they guide the birds without Pegasus?   

[Chishio Kunrin]

Earth pony: "Hello up there! Follow me!"
I dunno.

[Tiger]

Attempted creation of flying machines which resulted in the demise of many Earth Ponies. They eventually gave up when they found pegasi.

Idk

[cloudwilk]

They let the birds do their own thing 

Or just used a kite/rod. I'm sure it was a hassle.

[Etherdrone]

Considering how Ponyville even started, it's easy to believe they had Pegasi from the beginning. Sure, Earth Ponies started things with the Apple Family line and they would clean up winter their own way when it rolled over, but houses and families just became what it is now over a long period of time, of which Pegasi simply flocked to in their own time. Enough time for it being part of the tradition, as it is.

Sense.

[Snow Crystals]

I'm pretty sure the snow would still be there and the birds would watch as the snow melts.

Although earth pony can use ladders and broom sticks to knock off the snow.

[Mizuki]

Twilight: "Earth Ponies have been wrapping up winter in Ponyville for hundreds of years! It's tradition!"

Granny Smith: "When I was a young'n', THERE WAS NO PONYVILLE!"

Granny Smith how old are you...? 

[cloudwilk]

Maybe winter-wrap up surpassed being just a ponyville tradition.... Maybe it was just an ancient tradition that spread into ponyville.