Israel Jet Lag Calculator

One useful constant: Jerusalem — and with it the Israel clock — stays pinned to UTC+2 for the whole trip. Two Israel specifics compound the shift: Jerusalem sits at 754 m (altitude makes poor sleep feel worse), and Western Asia sits on the Asia travel circuit most Israel itineraries follow. A gap this size is a weekend problem, not a week problem: Jerusalem mornings feel early at first.

By day three or four in Israel, your body has caught up. Reference frame for Israel: Jerusalem keeps UTC+2 and sits 754 m above sea level in Western Asia, with daylight saving nudging summer clocks an hour.

Dry cabin air quietly drains you on the way to Israel; an extra 500 ml of water per 3 hours in the air keeps the Jerusalem arrival day survivable. Each eastbound zone costs about one recovery day, each westbound zone about two-thirds of a day — so the London–Jerusalem leg (eastbound, 2 hours) bills you about 2 days, while flying the opposite direction would cost only 1.3.

On arrival, anchor the new rhythm with an outdoor morning in Jerusalem and meals on Israel time from the first day. Applied to this Western Asia trip: 2 hours east from London to Jerusalem maps to about 2 reset days, so a Israel itinerary should front-load outdoor time on days one to 2.

The Israel sleep kit for Jerusalem at 754 m: an eye mask, earplugs, curtains closed against the early sunrise, and a room held near 16–20°C. A 10-minute warm shower an hour before bed speeds the core-temperature drop that starts sleep — a real head-start on the first jangled Israel nights in Jerusalem.

Naps are a tool with a limit in Israel: 20–30 minutes, done by 3pm Jerusalem time, never as a substitute for a full local night. Practical baseline: lights out in a dark 16–20°C Jerusalem room (754 m, UTC+2), and no evening alcohol for the first two nights while the Israel clock settles.