Jupiter's calendar would be having a day every 9 hours.
no
it rains horrs
it can flaot in the sky like no other!
Jupiters upper atmosphere is mainly carbon dioxide and nitrous oxide below that is a layer of condensed hydrogen or a sea of hydrogen because of the immense pressure in the atmosphere
Models suggest that the clouds on hot Jupiters could be composed of minerals like corundum and silicates, as well as exotic compounds such as titanium oxide and aluminum oxide. These clouds may form due to strong winds, vertical mixing, and high temperatures in the atmospheres of hot Jupiters.
Not at all. We spell it calendar like everyone else.
Well, you could say What is the point to our calendar! It was a way of knowing when the days were, just like our calendar!
You can see January 2007 Calendar at calendarlabs.com
The Ancient Mayan Civilization calendar.
It would be a lunar calendar. That means the calendar would not be based on the phases of the sun (or day), but on the phases of the moon.
The Mayan sun calendar was a religious calendar of 265 days. The priests consulted the calendar whenever an important decision was to be made, like when to plant crops or when to do sacrifices.
You can see a calendar of 1979 at calendarlabs.com . You can see a calendar for any month and any year in this website.