Well the greatest thing anyone ever did, in History happened over 2000 years ago that should make our day.... and every other day for that matter. Jesus paid for our entrance into Heaven. He took our place, and then some. He died about the most horrific death anyone could ever imagine... all for our wrongdoings, even in lieu of his own perfection.
God did this for us, out of His love for us. Not only did he pay our way into Heaven through Jesus, but when we believe this we also have purpose here on earth. Even though I have made mistakes, wrongful actions and thoughts even today, Jesus already paid for them on the cross.
Thanks for Easter time when we have a time set apart to celebrate the Gospel. However as Christians this is our staple, and our crux of everything we stand for.
Eternal salvation and purpose... I would say it was a Good Friday!