Calculating working shifts between two hours

Break point between Day shift and Night shift is defined as 6/24 hours

Need result in case that there are two breaking points: 6/24 and 22/24
Meaning that Night shift is between 22:00 and 6:00

I've tried to shift everything for 2 hours (6:00-> 8:00 and 22:00-> 24:00) to get one breaking point so above example could work.
Same thing I get if I take 6 hours...

But still missing something…

Does anybody have some clue...