Everyone has their typical 'work day' so you just get used to everyone's schedule and planned zooms around that and use slack for general communication. Occasionally I would msg or zoom outside of my core hours but we also had flex time so it worked out well. We generally always scheduled meetings through google calendar so timezones were handled there for coordination. If we mentioned a time in slack or on a zoom it was always given as NYC. It was a non-issue, motivation, sleep, food aren't related to this. Some team members worked later in the day in their local time zone by choose to overlap more with NYC.