Our prices are based on calendar days, not 24-hours intervals. The day of pick up is the first day you'll pay, no matter the time of pick-up. You can drop off any time of the day, the price will stay the same, no matter the time of drop off... As long as you don't go past midnight as then a new day will start.
You can pick up and drop off your Spaceships campervan 24 hours a day. Just make sure to select 'after-hours' (after 5pm but before midnight) or 'early after-hours' (after midnight but before 9am) when booking your campervan via the official Spaceships booking site, which will always give you the lowest price available on your travel dates/route combo.