Schedule Updates

A question that we all wonder is "when will _________ update their schedule?"

Well the answer is not always the same but typically they are released at similar times.  So far this year we've seen the following:

• Princess - updated Americas fall 2020 to spring 2021 in May of 2019
• Princess - updated Alaska 2021 anticipated in August of 2019
• Holland America - Fall 2020 to Spring 2021 itinerary released in late July of 2019

Know of other update timelines?  Please mention in the comments!