Chandigarh, November 10-Punjab Chief Minister Captain Amarinder Singh on Tuesday announced a 2-hour window for use of green fire crackers on Diwali, Gurpurab and Christmas across the state, except in Mandi Gobindgarh, where a total ban has been imposed from the midnight of November 9-10 till November 20-December 1 midnight on account of its poor AQI levels.Only green crackers will be allowed as per these orders, which are in compliance with the directives of the National Green Tribunal (NGT), as well as various judicial orders passed amid reports of fire crackers likely to aggravate the Covid problem.While on Diwali day (November 14), green crackers can be burst from 8 p.m. to 10 p.m., on Gurpurab (November 30), they will be allowed from 4 a.m. to 5 am and from 9 p.m. to 10 p.m. On Christmas Eve, people can burst these crackers from 11.55 p.m. till 12.30 a.m.Chairing a virtual Covid review meeting, the Chief Minister directed the Department of Science, Technology and Environment to issue the necessary notification in this regard.Warning against any violation of these curbs, he asked DGP Dinkar Gupta to crack down heavily to ensure penal action as per the law.