The day that God died for me.
Think about that for a moment. The only reason you and I can stand here on this day and thank God for redeeming us is that Jesus Christ, the perfect, spotless, holy, Son of God, died.
The bible says that in our sin we were storing up wrath for ourselves (Romans 2:5). One way or another that wrath had to be poured out. As sinners we blasphemed God by worshiping His creation instead of Him as Creator. We did not love Him and honor Him as God. We deserved to be condemned and punished for our sin.
Instead of consigning us to our deserved fate, God, in His infinite mercy, sent His very own Son to stand in our place.
But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ - by grace you have been saved. -- Ephesians 2:4-5
Jesus Christ came to this earth and in His perfect innocence willingly gave up His life and absorbed the wrath of God that we had been storing up. Every drop was poured out on Christ on our behalf. Because of that we will never know God's wrath (1 Thessalonians 5:9).
Instead we get salvation.
Not because we deserve it.
Not because we earn it.
Not because we choose it.
Only because on this day centuries ago, God died.