866-227-1888 has helped me more than once when I’m trying to figure out Carnival’s release schedule. They don’t drop every itinerary at once — it’s usually grouped by regions and ship classes throughout the year. When I planned a big family trip, I called in regularly, and one rep gave me the heads-up that the next round of Caribbean sailings was coming out “within days.” I checked again that week and boom — new dates were live. If you want first pick of cabins, catching those release windows is everything.