Ambala: Schools from play-way to 12th have opened in Haryana today. However, holidays in Ambala and Kurukshetra have been extended till January 17. Online classes have been started in some schools in Sonipat. It rained last night in 12 districts of the state – Yamunanagar, Panipat, Hisar, Nuh, Rewari, Sonipat, Palwal, Jhajjar, Mahendragarh, Bhiwani, Faridabad.