Well just stand between timezones… [sees alt-text] god damn it!

Inside the fourth box: Do not open unless this box is inside the other boxes and all the lids are closed.

1. Load the capsule onto a ship in 2024.
2. Sail to the easternmost point of the international date line and stop just before crossing.
3. At midnight, open the outer box.
4. Immediately cross the date line and then sail along it on the 2024 side, aiming for the westernmost point of the line.
5. While in transit, open the inner box
6. ???
7. Profit!..?