Fixed Time of Day Messaging for Nth Day After Check-in

Problem statement: Currently, users can only schedule messages based on a fixed number of hours after check-in. This results in erratic delivery times, risking messages being sent too early in the morning.

Proposed solution: The ability to schedule messages to be sent at a specific, fixed time of day (e.g., 10:00 AM) on a designated number of days after a guest's check-in (e.g., the day after check-in).

Unlock: This would allow hosts to check in with guests on how their stay is going at a professional and appropriate time of day, regardless of the exact check-in time.