Query Report/Request Module - Last Update Time from Yesterday 4:30pm to Today 8:30am

I am looking for a way to run a report of any requests that have been modified outside of our business hours.

So a report that can run to show requests that the Last Update Time was from Yesterday at 4:30pm until Today at 8:30am. But on Monday's this will be from the previous Friday at 4:30pm until Monday at 8:30am. If we could get it to automatically email the report that would be even better!

We are running SDP MSP v8.3 8310, on Postgres.

Filter by Account.

Fields to view are Request ID / Requester / Technician / Resolution / Request Status / Subject / Description

Help would be greatly appreciated!