Four Questions On "The Big Shabbat"

Four Questions About The Big Shabbat 

Why is it called the Big Shabbat?
 What does that name mean?
 All other holidays are associated with the day in the month when the celebratory event first transpired, but this is not about the day of the month, it's about the day of the week.
 Why are the events that happened on this Shabbat so significant that they're uniquely distinguished with a celebratory day?
  Many many miracles happened before the exodus, we don't celebrate the day that the water turned into blood? The days the other plagues happened, what is so unique about this Shabbat? Some write that this is the beginning of the miracles that happened but..I don't understand, don't the plagues rate for anything?? 

Good Morning! 

On the tenth of Nissan we were told by Moses to offer a sacrifice to G-d. We were told to offer a sheep as a sacrifice. The sheep was the deity of the Egyptians, and they asked us, what's our god doing in your house? When we responded that G-d is about to kill the Egyptian first born, the first born Egyptians were so frightened that they began a war with Egypt demanding that we be freed. 

That's why this miracle is so significant. 

It is not just about the victory of good over evil, and it's total destruction. 

It's about the greatest force of Egypt, of evil, represented by their first born sons, turning around to destroy itself. 

This is something that didn't happen before, and connected to Moshiach, who will cause darkness and evil to be transformed to light & goodness. And that's why it's celebrated on Shabbat specifically and not on the day of the month, the tenth of Nissan, this is because every Shabbat is a small taste of the coming of Moshiach Tzidkeinu, when impurity will be removed from the world, may we see this happen now!