National Prayer Day in the USA
National Prayer Day in the USA is held on May 7. Held on the first Thursday of May. This event in the first decade of the month May is annual. 
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The Lord's prayer is also known as our father's prayer and it can be found in the gospel coalition chapters in the Bible. 'Oh, heavenly Father, holy be your name, you are perfect on Earth as you are in heaven.
The National Day of Prayer is an annual day of observance held on the first Thursday of May, designated by the United States Congress, when people are asked "to turn to God in prayer and meditation". The president is required by law (36 U.S.C. § 119) to sign a proclamation each year, encouraging all Americans to pray on this day. The modern law formalizing its annual observance was enacted in 1952, although earlier days of fasting and prayer had been established by the Second Continental Congress from 1775 until 1783, and by President John Adams in 1798 and 1799.
Similar holidays and events, festivals and interesting facts
National Crepe Suzette Day and Beverage Day in USA on May 6
National School Nurse Day in US on May 6 (is always the Wednesday of National Nurses Week);
National Bike to School Day in USA on May 6 (Held on Wednesday the first full week of May);
National Roast Leg of Lamb Day and National Homebrew Day in USA on May 7
Be Best Day in USA on May 7 (instituted by Donald Trump on May 7, 2018);
MDS Coordinator Day in USA on May 7
Emancipation Day on May 8 (Columbus, Mississippi);
National Coconut Cream Pie Day in USA on May 8
Military Spouse Appreciation Day in United States on May 8 (celebrated on Friday before Mother's Day);
CVS Health Day on May 8
World War II Victory Day in the United States on May 8