“I have just two days on my calendar: today and that day. As always, Luther’s approach to life lines up well with Scripture.
In the Lord’s Prayer Jesus teaches us to pray, “Give us this day our daily bread.” As the Catechism explains, “These words teach us not to be greedy or wasteful or to worry about the future but to live contentedly in the confidence that God will give us what we need.”
In Matthew 6:34 Jesus says, “Do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own.”
The other day we should be concerned about is that day. By that day Luther means the Last Day. This month we wrap up another church year by looking at the end of the world when Jesus returns for judgment.
Again, Scripture encourages us to have that day on our calendars: [Jesus said] “But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap.  For it will come upon all who dwell on the face of the whole earth.  But stay awake at all times, praying that you may have strength to escape all these things that are going to take place, and to stand before the Son of Man.” (Luke 21:34-36)
The best way to live with Luther’s two days on your calendar is to focus on the cross of Jesus Christ. Because he gave his life to save us from our sins we can trust him to take care of us no matter what the future holds. And when we stand before Jesus for Judgment Day, again, knowing that Jesus died for us means we have nothing to fear. None of our sins can condemn us.