It's not good because it's Friday.
It's not just another day.
It is when the price was paid for sin, once for all.
A bloody price, a messy price, pain-filled, discomforting and...The requirement for our redemption.
It's not about how good you are.
It's not about your effort.
It's the price Christ paid, with his own blood, body, sweat...His payment, for our freedom.
That's why it's called Good Friday.
"It is finished...." John 19:30