No. Every day is Christmas if you wake each day celebrating the birth of Christ in you. A new day is a new birth. It’s that simple.
Regardless of what you did the day before, if you repent what you did wrong and ask God for forgiveness, you are forgiven. And the next day will be the birth of Jesus in your heart, if you just allow it.
Christmas is not over if you celebrate the birth of Jesus in your heart each day. And New Year resolutions are meaningless if you approach each day as the New Year, resolving to put sin behind you and Jesus in front of you.
Celebrate Christmas today, tomorrow, and every day in the New Year!