I worked East coast time from the Mountain time zone, with colleagues primarily in the East Coast, Europe, and India. The 6am meetings were a constant feature

I worked East coast time from the Mountain time zone, with colleagues primarily in the East Coast, Europe, and India. The 6am meetings were a constant feature - complicated by the semi-annual daylight saving time dance. Indian coworkers shifted their work day a bit later (helped a little with traffic!). Europe definitely preferred the mid-afternoon meetings, rather than flipping them by 12 hours. Adding anyone from Oceania would be difficult...