To find out how many hours until 11 PM from the current time (4:39 AM):

• Current time: 4:39 AM
• Target time: 11:00 PM (same day)

Calculate the difference: From 4:39 AM to 11:00 PM is:

• From 4:39 AM to 4:39 PM = 12 hours
• From 4:39 PM to 11:00 PM = 6 hours and 21 minutes

Total time until 11 PM = 12 hours + 6 hours 21 minutes = 18 hours and 21 minutes Answer: There are approximately 18 hours and 21 minutes until 11 PM today.