winter solstice is the shortest day in the southern hemisphere.
winter solstice is the shortest day in the southern hemisphere.
what date is the shortest day in the southern hemisphere?
winter solstice
the winter solstice occurs during the hemisphere's winter. in the northern hemisphere, this is the december solstice (usually 21 or 22 december) and in the southern hemisphere, this is the june solstice (usually 20 or 21 june). although the winter solstice itself lasts only a moment, the term sometimes refers to the day on which it occurs. other names are "midwinter", the "extreme of winter" (dongzhi), or the "shortest day". traditionally, in many temperate regions, the winter solstice is seen as the middle of winter, but today in some countries and calendars, it is seen as the beginning of winter. in meteorology, winter is reckoned as beginning about three weeks before the winter solstice.
winter solstice
long-day plants flower when the night length falls below their critical photoperiod. these plants typically flower in the northern hemisphere during late spring or early summer as days are getting longer. in the northern hemisphere, the longest day of the year (summer solstice) is on or about 21 june. after that date, days grow shorter (i.e. nights grow longer) until 21 december (the winter solstice). this situation is reversed in the southern hemisphere (i.e., longest day is 21 december and shortest day is 21 june).









































some long-day obligate plants are:









































bullet::::- carnation ("dianthus")









































bullet::::- henbane ("hyoscyamus")









































bullet::::- oat ("avena")
photoperiodism