Can I apply for an ID card during Zhangzhai holiday in Peixian County?

You can't. According to the release of Pei County Government Affairs Service Center, the time to apply for an ID card in Zhangzhai, Pei County is from Monday to Saturday, excluding legal holidays, from July 15 to September 30 in summer, and from June 10 to July 14 in spring, autumn and winter. Peixian County, called Peize and Xiaopei in ancient times, is located in the northwest of Xuzhou City, Jiangsu Province, at the southeast edge of North China Plain and the northwest of Huaihai Economic Zone, with a total area of 1.576 square kilometers.