In both March and September, close to the two equinoxes.
4 days/ nights and 18 hours
a month
One month can equal each of those numbers of days.
Nearly a month. Or 708 hours.
1500 per month * 365 days = 547500 days/month = 18000 when the units are adjusted.
On Equinoxes
There are some tiny variations because of the tilt of the earth, but we can say that days and nights are roughly equal at the equator.
Yes
no
4 days/ nights and 18 hours
North pole &south pole
because earth is rotating and revolving
a month
One month can equal each of those numbers of days.
Nearly a month. Or 708 hours.
The seasons are already figured out . . . the seasons change on the equinoxes (days and nights of equal length) and on the soltices (days and nights are the most different in length)
At the Equator at the two Equinoxes, Spring and Fall.