Greece Jet Lag Calculator

Under six hours of shift, most travellers absorb Greece inside a long weekend — eastward nights feel short for two or three evenings in Athens (UTC+2), then settle. Context for the adjustment: Athens rests at 70 m above sea level, and Greece's position in Southern Europe shapes both flight routing and how much daylight you meet on arrival.

Greece keeps a single reference offset of UTC+2 across Athens, so the mental math never changes mid-trip. Reference frame for Greece: Athens keeps UTC+2 and sits 70 m above sea level in Southern Europe, with daylight saving nudging summer clocks an hour.

Day one in Athens: sunlight before midday. Meals go on the local clock in Greece, and lights-out stays no earlier than 9:30pm so the body accepts the new zone. Before you fly to Greece: move bedtime and meal times 30–60 minutes per day toward Athens time for 3–4 days.

In the air on the Greece route (arrival UTC+2), hydrate hard and skip alcohol. Sleep only when it is night in Athens, so the cabin previews Greece hours. Direction changes the bill: flying to Greece eastward from London costs about 2 days of recovery.

The westward routing to Athens costs only 1.3 — the body clock delays to Greece more easily than it advances. Applied to this Southern Europe trip: 2 hours east from London to Athens maps to about 2 reset days, so a Greece itinerary should front-load outdoor time on days one to 2.

If the afternoon slump hits in Athens, nap 20–30 minutes maximum, before 3pm Greece time. Or push through with a walk in Greece — long naps push adjustment back a day. Near-4am wakings are part of night one in Athens (70 m, UTC+2); stay dark and still, skip the clock-checking, and Greece nights settle by the third.

For shifts over six hours — into Greece, that means the 2-hour London gap — 0.5–3 mg of melatonin at Athens bedtime (UTC+2) pulls the clock faster in 3–4 nights. Clear Greece dosing with a clinician first. Practical baseline: lights out in a dark 16–20°C Athens room (70 m, UTC+2), and no evening alcohol for the first two nights while the Greece clock settles.