The 2013 USA Outdoor Track and Field Championships was held at Drake Stadium in Des Moines, Iowa. Organised by USA Track and Field, the four-day competition took place June 20–23 in conjunction with the USA Junior Outdoor Track & Field Championships which started the day before and served as the national championships in track and field for the United States.

Based on that paragraph can we conclude that this sentence is true?
June twentieth through the twenty third was the dates of the competition. 
Yes