(Trent Nelson | The Salt Lake Tribune) The City of Millcreek will be having its 1 year birthday party and grand opening of its City Hall on Wednesday​ January 10th, ​ from 6pm to 9pm., Wednesday January 10, 2018.(Trent Nelson | The Salt Lake Tribune) The City of Millcreek will be having its 1 year birthday party and grand opening of its City Hall on Wednesday​ January 10th, ​ from 6pm to 9pm., Wednesday January 10, 2018.