(UPDATE I fixed it all i did was click the checkbox on steam and i now have the 4 seasons on the new world i just made the update might have of fixed it but that was likely the problem) I was excited to link worlds with my new 100+ survival ship wrecked world with an RoG one. I made a new one and i started playing and when i checked the seasons with the mod i had it said only Autumn and Winter so i thought I messed up and I picked the wrong one since i just bought RoG. I made 2 new worlds and made sure that both the SW and RoG had all seasons on i went to the seaworthy in SW went to the RoG world and surely there were only Winter and Autumn. I tried going ahead in days with GetClock():MakeNextDay() but it just went in the normal vanilla cycle without spring or summer. I tried going to the middle of summer and it started me about 3 days into autumn. I do not think this is intentional at all but it might be. I made a SW and a RoG world without any mods and the same thing happened so it isn't them for sure. I skipped through all the days again and on day 68 likely quite a few earlier since i was speeding bye i heard a deerclops and snow was still on the ground even after i waited about 30 seconds. I also haven't touched any of the files. There is a small chance that the reason this happens is that i just bought RoG but again like i said it shows the SW/RoG shield when i go to select it.
Just link a SW and an RoG world with the Seaworthy and the RoG world won't have all seasons that come with RoG but will have the items and creatures like glommer and bearger