Lost Stars by Claudia Gray, published September 4th, 2015, is the canonical source that first identifies that name of the planet as Endor.

No "onscreen" clarification is given. The canon, however, is that Endor is the name of the gas giant and one of its moons.

Something I have really tried doing this year is to place my joy in discovering the unknown. Win or lose, I remind myself that my team has never been precisely here ever before. Everything else (outcomes, rankings, and titles) are heuristics.

To your point, 8-7 months of promotion would have landed it nicely in September or October. Instead, we got the gauntlet of Black Panther (February), Infinity War (April), Solo (May), Incredibles II (June), Ant-Man and the Wasp (July), and then no other major Disney releases until November.

Solo, an underappreciated movie, despite being finished, was still rushed into theaters. The studio botched the promotion. I suspect they panicked. From both the unprecedented price tag of Solo and, to a lesser degree, the unprecedented online vitriol for The Last Jedi. (apologies, I enjoy Solo)

Disney: Oh no! The worst people on the internet hated The Last Jedi! Solo! Solo! Solo! LOVE US!!!

CinemaSins is a dessert, not a diet.

Which I find even more unfortunate, because I think the people who make CinemaSins (Honest Trailers, How It Should Have Ended, Pitch Meeting, etc.) actually like movies.
When a fun little stupid niche becomes elevated to a "culture", you lose the fun little part and are just left with the stupid.

Wait.
It will either go away before you die or at the same time.

I accept Venmo.

increase attack or decrease damage

Darmok and Jalad Their Plates Clean

As old as Vader, but aging like Obi-Wan...
(only 9 years later)
Did that help?