The Congressional App Challenge (CAC) is a public effort to encourage students to learn how to code, through annual district-wide competitions hosted by Members of Congress for their district.
Middle and high school students code original applications for the chance to be selected for recognition by their Member of Congress, win prizes, and have their work put on display in the Capitol Building in Washington, DC.

the Congressional App Challenge will accept submissions from June 4 – October 15:

Noon EST, Monday, October 15, 2018. Try to register before September 10, 2018 (registration indicates your intent to compete). Early registration significantly increases the chances for a successful challenge. Early registration does not obligate you to submit an app.

For more information: https://www.congressionalappchallenge.us/