Forever, because the moon doesn't spin so the light side is always light and the dark side is alaways dark.
"Luna" refers to the moon, which does not correspond to a specific day of the week in most calendars. Different cultures may have different associations with the moon and assign certain days or meanings to it, but there is no universal day of the week that corresponds to Luna.
Mars.
the length of day on earth is 24 hours
Mars
The length of the day in th US is the same as the length of the day anywhere else in the world, roughly 24 hours.
the length of a day on Jupiter is average, 9.9 hours
the length of the day is not a fixed unit of time
See answer given for length of Venus day in hours.
The length of a "day" on the moon is 29 Earth days.
Juan Luna's siblings were Antonio Luna, Joaquin Luna de San Pedro, Manuel Luna, Jose Luna, and Numeriano Luna.
During the Autumn equinox the length of the day and night are nearly equal. The length of the day on the equinox is approximately twelve hours.
Mars has a day of 24 hours 39 minutes and 35 seconds