Advanced rules based on date/time does not allow you to create a rule that spans across 2 days.
Reproduction
Go to My Settings - Call Handling & Forwarding - Advanced - Create a rule based on date/time - mark start date as any time in the PM - mark end time as any date in the AM - Submit
Result
This will generate an error message stating there is a conflict that the TO field must not be greater than the FROM field. This type of rule can be achieved in the Biz Hours rules so it should also be an available option in the advanced rules section.
Reproduction
Go to My Settings - Call Handling & Forwarding - Advanced - Create a rule based on date/time - mark start date as any time in the PM - mark end time as any date in the AM - Submit
Result
This will generate an error message stating there is a conflict that the TO field must not be greater than the FROM field. This type of rule can be achieved in the Biz Hours rules so it should also be an available option in the advanced rules section.