You don't want to send messages to your guests at 4 AM if they are coming from halfway around the world. For this reason, we enforce a rule: all messages sent under the Reservations flow should only be received between 9 AM and 9 PM by the guest, wherever they are.
Here's how we determine the time zones and how we may reschedule the messages a bit earlier than planned to enforce this rule.
During the stay, on the check-in day and before the check-out day: we always use the timezone of the property without any other check.
Before the day of the check-in, and after the day of the check-out: we will use the timezone of the property, but we also ensure that the message is not sent outside 9 AM - 9 PM in the timezone of the city your guests say they come from.
If you don't want this rule applied to your scheduled messages, you can disable it.
Go to Settings.
Click on Preferences.
Click on Guest experience within the "Account preferences" section.
Disable the option "Enforce time restrictions (between 9 AM and 9 PM) and click Save changes.