Summary
While there is no core functionality to change the time that a scheduled report is sent, it is possible to use a scheduled job to execute a PDF reportOverview
The scheduled reports are sent out at whichever frequency they are scheduled for at 1:00am Exinda time. There is no way to configure this time that the reports are executed and emailed out in the options of the Scheduled Report itself.Workaround
As a workaround, a PDF report can be created based on the interval required, and a scheduled job can be created to execute the PDF report.
For example: Creating a report for the 'previous month' of data.

And under Configuration > System > Setup, the "Scheduled Jobs" tab, it is possible to execute the CLI command every month at a specified time.

For example: Creating a report for the 'previous month' of data.
And under Configuration > System > Setup, the "Scheduled Jobs" tab, it is possible to execute the CLI command every month at a specified time.