Yesterday President Biden issued a Proclamation (full text) declaring today to be National Day of Prayer. Federal law, 36 USC §169h, provides:
The President shall set aside and proclaim the first Thursday in May in each year as a National Day of Prayer, on which the people of the United States may turn to God in prayer and meditation at churches, in groups, and as individuals.
The President's Proclamation reads in part:
On this day, we recognize the healing power of prayer, especially as we recover from the trauma and loss of the COVID‑19 pandemic. Today we find ourselves in a moment of renewal — of lives saved, of new jobs created, and of new hope for rebuilding America. Today is also a moment of reflection when we are called to address some of the greatest challenges humanity has ever faced — saving our planet from the existential threat of climate change; responding to attacks on democracy at home and abroad; and living up to our Nation’s promise of liberty, justice, and equality for all.