If the sun rinses at 7:30 AM and it's 12:00 PM what time does it mean the day is half over?

The day is half over at 12:00 PM.

If the sun rises at 7:30 AM and it's 11:20 AM what times marks the day is halfway over?

If the sun rises at 7:30 AM, halfway through the day would be at 1:00 PM.