It would appear that the wheel of the year is a product of its own environment. Let's look at some of the problems associated with its use in other geographical regions. The following is from Wikipedia :-

"As the Wheel originates in the Northern Hemisphere, in the Southern Hemisphere many Neopagans advance these dates six months so as to coincide with the natural seasons as they occur in their local climates, which oppose and complement those of the Northern Hemisphere. For instance, a Wiccan from southern Australia may celebrate Beltane on the 1st of November, when a Canadian Wiccan is celebrating Samhain. The appropriate set of festivals for an Equatorial Wiccan is problematic."

In the southern hemisphere there are various problems as indicated above but the real headache hasn't been mentioned; if you are facing north, towards the sun, it rises to your right hand side and sets to your left hand side. This means that the sun is moving through the sky in the opposite direction, which means clockwise is reversed. So which direction do you go to cast a circle and then which to break it ? Are deosil and widdershins reversed ?

The equatorial regions are possibly even worse. Depending on the time of year the sun flip flops between the northern and southern versions and by the same means so does clockwise. Seasons have little meaning, there could easily be 2 growing seasons per year.

I suppose that we should just be grateful that, unlike various other religions, ours doesn't require fasting. During the month of Ramadan Muslims are required to abstain from eating, drinking any liquid, and sexual intercourse during the daylight hours of this month. That is probably fine if you are in a tropical zone where there are roughly 12 hours of daylight. The Islamic calendar is based on 12 lunar months of 354 or 355 days which means that it moves through the seasons. If Ramadan occurs in the winter in the northern hemisphere, less awkward, if summer more awkward due to the length of daylight. Now imagine you are a Muslim in the northern polar region when Ramadan falls midsummer and the sun doesn't set. No, sex would be the least of your problems.