Almost everything you can reserve ahead of a cruise opens on a schedule the cruise line sets, counted from your sailing date and sometimes from the fare or package on your booking. Nothing about that schedule is secret, and nothing about it announces itself either.
Get your dates before you plan anything else
Ask the cruise line, in writing, when each bookable item opens for your specific sailing and your specific booking.
Windows differ by brand, by ship and sometimes by what you booked, which is exactly why a general answer from the internet is worth less than one answer about your booking.
- Dining rooms and specialty restaurants
- Shows and anything with limited seating
- Shore excursions, spa and children's programming
- Online check-in and choosing a boarding time
Put the window in a calendar, with a reminder ahead of it
The window opens at a specific hour in a specific time zone, and the most requested items move quickly.
Set the reminder for the day before rather than that morning, and note the time zone the cruise line uses instead of your own. A reminder that goes off while you are asleep is the same as no reminder.
A missed window is not a missed trip
Waitlists, cancellations and onboard availability are real: one missed date is a smaller problem than a week with no plan.
Ask what happens to the places other guests release, whether there is a waitlist and what can still be arranged once you are aboard. Then ask the same question about the one thing your family actually cares about, because the answer is not the same for everything.
Decide what your family will not reserve
A trip with every hour committed is a plan the group has to keep executing.
Choose the few moments that deserve a clock and leave the rest of the days open. That is a planning decision, not a sacrifice.
The calendar that matters is not the one counting down to your sailing. It is the one counting down to the day each reservation opens.
Details that change by date, supplier or destination should always be confirmed before you decide.