It's surprising that I'm not able to select 'current month' or 'this month' as an option to run an Insights report for.
Example: If I decide on July 15, 2019 that I want to set up a report to show all data for an event that was tracked in July 2019 (with the expectation of looking at the report on subsequent days within July 2019, and at later times after July 2019), I'm only able to select 'between July 1 and 15' and would need to change it in the report on future days to select a later date in July 2019 as the 'end date.'
Current options:
Another option is allowing for the selection of a future date, such as on July 15, 2019 being able to select July 31, 2019 as the 'end date'