) ▁indicated ▁that ▁they ▁are ▁once ▁again ▁studying ▁feas ibility ▁of ▁two ▁time ▁zones ▁for ▁India . ▁Pro pos als ▁for ▁creating ▁an ▁additional ▁Eastern ▁India ▁Time ▁( E IT ▁at ▁UTC + 0 6 : 0 0 ), ▁sh ifting ▁default ▁I ST ▁to ▁UTC + 0 5 : 0 0 ▁and ▁Day light ▁saving ▁( Ind ian ▁Day light ▁Time ▁for ▁I ST ▁and ▁Eastern ▁India ▁Day light ▁Time ▁for ▁E IT ) ▁starting ▁on ▁ 1 4 ▁April ▁( Am bed kar ▁Jay anti ) ▁and ▁ending ▁on ▁ 2 ▁October ▁( G and hi ▁Jay anti ) ▁was ▁submitted ▁to ▁D ST ▁for ▁consideration . ▁ ▁Time ▁signals ▁Official ▁time ▁signals ▁are ▁generated ▁by ▁the ▁Time ▁and ▁Fre quency ▁Stand ards ▁Labor atory ▁at ▁the ▁National ▁Phys ical ▁Labor atory ▁in ▁New ▁Del hi , ▁for ▁both ▁commercial ▁and ▁official ▁use . ▁The ▁signals ▁are ▁based ▁on ▁atomic ▁clock s ▁and ▁are ▁synchron ised ▁with ▁the ▁world wide ▁system ▁of ▁clock s ▁that ▁support ▁the ▁Co ordin ated ▁Universal ▁Time . ▁ ▁Fe atures ▁of ▁the ▁Time ▁and ▁Fre quency ▁Stand ards ▁Labor atory ▁include : ▁High ▁frequency ▁broadcast ▁service ▁operating ▁at ▁ 1 0   M Hz ▁under ▁call ▁sign ▁A TA ▁to ▁synchron ise ▁the ▁user ▁clock ▁within ▁a ▁mill isecond ; ▁Indian ▁National ▁Sat ellite ▁System ▁satellite - based ▁standard ▁time ▁and ▁frequency ▁broadcast ▁service , ▁which ▁offers ▁I ST ▁correct ▁to ▁ ± 1 0 ▁micro second ▁and ▁frequency ▁cal ibration ▁of ▁up ▁to ▁