9 hr 20 min daylight, subract fir 24 to get darkness
21
21 hours has 75,600 seconds.
It varies, there are no set hours for an interior decorator
12 hours*21 days=252 hours
21 hours
21 hours.
21 hours.
21
21 hours
21 hours
14 hours 21 minutes.
It is 21 hours.Note: 10 am to 10 pm is 12 hours, 10 pm to 7 am is 9 hours, 12 + 9 = 21