I built a system like this one that we coined "daily update" and supporting the concept of a non uniform morning was just a matter of using timezones. Each empl

I built a system like this one that we coined "daily update" and supporting the concept of a non uniform morning was just a matter of using timezones. Each employee had a timezone setting that was automatically detected but could be overridden and our morning email was sent to them at their 9am. Now, obviously what time you start your day is subjective but it seemed to work for those that enjoyed it by being the earliest value.