21 days and no hours
1,350 hours = about 1.85 months (1.84808875 months)
8,000 hours = about 11 months (10.9516371 months)
12 months/year x 21 years = 252 months
1,200 hours is ~1.642746 months.
21 days and no hours
5 months
The only desert that would have 21 hours of sunlight would be Antarctica during the summer months.
1,350 hours = about 1.85 months (1.84808875 months)
8,000 hours = about 11 months (10.9516371 months)
12 months/year x 21 years = 252 months
855 hours is ~1.17046 months.
1,200 hours is ~1.642746 months.
500 hours = 0.684477316 months
250 hours = about 0.34 months.
600 hours = 0.82 months.
480 hours is about 0.657098 months.