Gurugram green crackers can be sold only at 23 sites until November 6, with fixed use timings and 4,300-plus police personnel deployed. Gurugram green crackers can be sold at 23 designated sites until 6 November. Use is allowed only during two time windows on 7 and 8 November. DC Uttam Singh says only NEERI-certified crackers can be sold and used, complete ban will resume from November.