Argonne Jet-Lag Planner
Plan your FEAST/FAST cycle and hit destination breakfast on time.
Trip Setup
Origin time zone
Auto-filled to your device's zone; change if needed.
Destination time zone
Pick the IANA time zone for your destination city.
Departure (origin local)
Arrival (destination local)
Breakfast time (destination local)
Use 07:30
Suggest typical
Tip: Argonne anchors to destination breakfast on arrival day.
Compute
Compute plan
Reset
Current Status
Current Stage
—
Countdown to destination breakfast
—
Caffeine window (today)
—
Argonne restricts caffeine timing; varies by direction and day.
4-Day FEAST/FAST schedule (anchored to destination breakfast)
Day
Date (your local)
Stage
Meals & caffeine
Break the final FAST with a high-protein breakfast at destination breakfast time; then follow destination mealtimes.