NewPlanner · Teams · Web
Planner: Add times to task start, finish, and due dates
Planner tasks will support specific times for start, finish, and due dates with plan-level time zone and working hours configuration. Admins and users can define default task times and view times in either the plan's time zone or their local time zone to improve cross-timezone coordination.
Microsoft's description
Add specific times to task start, finish, and due dates. Define a plan’s time zone and working hours to automatically provide default task times and choose whether to view times in the plan’s time zone or your local time zone. This helps distributed teams coordinate effectively across time zones and keep deadlines clear.