Today is a full moon uposatha day. The full moon uposatha is considered the most auspicious of the (usually) four lunar observance days occurring each month. The other three observance days are the new moon and the two half moons.
In "Beginning Our Day, Volume 2," Ajahn Amaro shared the following thoughts to the community of Abhayagiri Buddhist Monastery:
"The purpose of our weekly Observance Day is to put our usual daily tasks down and focus on the precepts and the formal spiritual qualities of our life...It's a time to remember the possibility we have as human beings to let go of all confusion, delusion, aversion, greed, and self-centeredness. It's a time for renewing our motivation and to begin again fresh. ...We're remembering our priorities and helping to clarify the central principles of our lives."