September 1. Official website, Education Bureau of Zhoukou City, showed that the summer vacation time of Zhoukou Primary School in 2009 was from July 6th to August 3rd 1 and September1. Zhoukou City, formerly known as Chen Zhou and Longdu, is a prefecture-level city under the jurisdiction of Henan Province, located in the southeast of Henan Province and in the hinterland of Huanghuai Plain.