You already have an entire vocabulary for solar time (sunrise, morning, noon, evening, sunset, night, midnight). This being all of a sudden assigned to a different time on a clock does not change things in any dramatic fashion. It would also be a consistent change for your current location, guarantee it only takes you less than a work week to acclimate.

All the things you've described I've literally been doing for 6 months now. It is not a noticable difference and does not impact me.

Also, a book that says "it was 5 o'clock" is objectively more boring than one that describes the shadows of twilight blanketing the scene in a checkering of shadow. Also TV shows show outside, where solar time is visibly apparent. The specific time is not nearly as relevant.

Also, you already look up time zones when scheduling international meetings, and those aren't going to tell you about siestas or other local practices which might affect scheduling. Maybe just actually ask the person what times will work when trying to schedule, and now since you're both using UTC, you both can figure it out together without looking up timezones.