LAHORE, June 21: The Punjab government has declared June 26 (Thursday) as a closed holiday in Lahore, Rawalpindi, Sheikhupura, Okara, Faisalabad, Gujranwala, Hafizabad, Mandi Bahauddin, Sialkot, Nankana Sahib, Khanewal, Pakpattan, D.G. Khan, Muzaffargarh, Bahawalnagar and Rahim Yar Khan districts in connection with by-elections, says a handout.