Pakistan Jet Lag Calculator

The size of your Pakistan jet lag is the absolute gap between your home offset and Islamabad's UTC+5. London departures face 5 hours, New York 10, Tokyo 4 and Sydney 5 — each figure feeds the recovery estimate for Islamabad at UTC+5.

Context for the adjustment: Islamabad rests at 507 m above sea level, and Pakistan's position in South Asia shapes both flight routing and how much daylight you meet on arrival. Reference frame for Pakistan: Islamabad keeps UTC+5 and sits 507 m above sea level in South Asia, with that same offset in every season.

Day one in Islamabad: sunlight before midday. Meals go on the local clock in Pakistan, and lights-out stays no earlier than 9:30pm so the body accepts the new zone. Three levers run the Pakistan recovery: light, sleep timing and hydration.

Start with pre-flight drift for Pakistan — 30–60 minutes per day toward Islamabad time. Hold the line in the air for Pakistan: water instead of wine. Caffeine before noon only, and set the watch to Islamabad time, UTC+5.

Direction changes the bill: flying to Pakistan eastward from London costs about 5 days of recovery. The westward routing to Islamabad costs only 3.3 — the body clock delays to Pakistan more easily than it advances. Applied to this South Asia trip: 5 hours east from London to Islamabad maps to about 5 reset days, so a Pakistan itinerary should front-load outdoor time on days one to 5.

Near-4am wakings are part of night one in Islamabad (507 m, UTC+5); stay dark and still, skip the clock-checking, and Pakistan nights settle by the third. For shifts over six hours — into Pakistan, that means the 5-hour London gap — 0.5–3 mg of melatonin at Islamabad bedtime (UTC+5) pulls the clock faster in 3–4 nights. Clear Pakistan dosing with a clinician first.

Cap naps at 20–30 minutes and finish them by 3pm Islamabad time (UTC+5); anything longer steals the night that actually resets your clock to Pakistan. Practical baseline: lights out in a dark 16–20°C Islamabad room (507 m, UTC+5), and no evening alcohol for the first two nights while the Pakistan clock settles.