Finish packing, confirm bookings and mobile roaming, download maps and tickets (flight, accommodation, festival). This is your best window to confirm Tomorrowland ticket & shuttle info.
Long-haul overnight flight crossing the Atlantic. Aim for an overnight service (direct or 1-stop) to arrive in Amsterdam the next day in the morning local time.
Wander the Jordaan neighborhood's shops and courtyards; if you prebook Anne Frank House timed tickets, visit in the late afternoon (strictly timed & often sells out).
Attend the festival (set times vary by stage) — check the festival app for schedules and stage locations; typical hours run late into the night/early morning.
Begin journey home to San Diego. Depending on your flight schedule, expect at least one connection; book a daytime departure if you prefer arriving same day back in the US (time zones applied).