Our friends at the Family Research Council are once again sponsoring the Call2Fall initiative, where churches set aside a definite time during worship on July 3, 2016 for people to get on their knees and faces before the Lord in repentant prayer for God to reshape our lives and renew our land. The key verse for this is 2 Chronicles 7:14:
“If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land.”
You can find plenty of resources for your church or pastor at the Call2Fall website.