We cannot make the Kingdom of God happen, but we can put out leaves as it draws near. We can be kind to each other. We can be kind to ourselves. We can drive back the darkness a little. We can make green places within ourselves and among ourselves where God can make his Kingdom happen.
If we are a people who pray, darkness is apt to be a lot of what our prayers are about. If we are people who do not pray, it is apt to be darkness in one form or another that has stopped our mouths.
All other days have either disappeared into darkness and oblivion or not yet emerged from it. Today is the only day there is.