Does your company have multiple workplaces located in different time zones\?
If a user can timestamp clocking in in a certified way, the clock that appears on the Home page shows the time of the main workplace that has been assigned to him or her.
If the workplace assigned to the user is located in Milan, the clock shows the time in the Milan zone (UTC +1). If the workplace is in New York, the clock shows the time in the corresponding time zone (UTC -5).
All the times visible in a user's calendar are not converted in any way (timestamps, shifts, etc.).
User Mark, who is assigned the New York workplace (UTC -5), timestamps clocking in at 09:00 → in Milan (UTC +1) it is 15:00 → if a user from Milan enters Mark's calendar, he or she will see the timestamp as reading 09:00.