Formula to work out day/night based on start and end hours

Good Morning All,
I need a little help with some data. I have a spread-sheet with over 10,000 rows of data. The attached file shows the headings and type of data in the cells. I'm struggling with a formula for column G (day/night). What I need to do is populate this column with 'night' but only where:

The start date and end date is the same and the issue occurred after 9pm (using start time column)The end time is equal to 5am or less but again where the start and end date is the same (based on end time)The difference between the start and end date is one day and the issue occurred at or after 9pm on the start date but at or before 5am on the end date.

I have no idea if this makes any sense but please let me know if further clarification is needed!

Once that is done, I then need to work out what took place on a Friday, or Friday into Saturday, Saturday or Saturday into Sunday etc.
Any, and I mean any help would be appreciated.
Thank you all in advance!
A Frustrated Excel User


Attachment 489841