Singular they is brilliant! Even calling it a 'gender-neutral' pronoun doesn't capture its brilliance. Because we don't just use it for that, but only in a subset of such cases. Not only is its referent gender-neutral, but it their identity isn't known at all.

Take for example: Someone left their umbrella. We…

It's probably a combination of that and the word "come" being used to mean having an orgasm.

"The first (maybe only) science-fiction-comedy-multimedia phenomenon,"

Yes, but It is hard to imagine what they used to determine the orbital period without stable seasons. especially with unstable seasons where the night day periods are different. I ma still hoping that george springs a "The years are 440 days long" on us so that the characters are appropriately aged.

I'm just wondering how the concept of a year consisting of a fixed number of days-per-year came into use on such a world where the length of seasons are so inconsistent? The very concept of a year as the fulfillment of a pattern of recognizable seasons arose with the development of the organized agrarian society. …

No. 6; It's not a planet as we know it.