LAHORE - Clock will be reversed by an hour on Saturday at 12 midnight, thus bringing the official time again five hours ahead of GMT. Pakistan advanced the official clock by one hour on April 15 to use more daylight time in a bid to conserve energy. Thus the official clock was brought six hours ahead of GMT on April 15. At that time, the country was facing massive shortfall of around 4,000 megawatts that was resulting in power outages. The reversal of clock to its original time would once again put the citizens in troubled water, as it would be difficult for majority of them to adjust once again to the new timings.