Yes, the seasons are the opposite from those in the Northern Hemispere. Down under it is easier to get vitamin D, because we get more days of sunshine in proportion to days of rain. To clarify: the summers are not longer, just proportionally there are more sunny days. Our winters start in early May, and the flu season is kind of over in late September. In New Zealand, we still get cold snaps though, so even as late as November there can be frosts. In higher areas, there are sometimes frosts in December, which is mid-summer. However, everyone starts getting out and about in early September, so vitamin D and fresh air blows out the cobwebs.