Preventing jet lag when traveling to Europe in 2026 involves a combination of circadian rhythm management and strategic hydration. Since traveling east is generally harder on the body, you should begin shifting your sleep schedule 30 minutes earlier each night starting three days before your departure. Upon boarding, immediately set your watch to your destination's time zone. If it is nighttime in Europe, use an eye mask and noise-canceling headphones to sleep on the plane. Conversely, if it is daytime, stay awake and hydrated; avoid alcohol and heavy caffeine, as they disrupt REM cycles. Once you arrive, the most critical step is natural light exposure. Spend your first morning outdoors; sunlight helps your brain suppress melatonin and reset your internal clock. Avoid the temptation to nap during the day; if you must, limit it to 20 minutes before 2:00 PM. High-tech solutions like light-therapy glasses or low-dose melatonin (0.5mg–3mg) taken 30 minutes before your new local bedtime can also significantly accelerate your adjustment period.