Summer is one of the four temperate seasons.
Astronomically, it begins with the summer
solstice
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(around 21 June in the Northern
hemisphere, and 21 December in the Southern
hemisphere), and ends with the autumn
equinox (around 21 September in the Northern hemisphere and 21 March in
the Southern hemisphere). However, sometimes it is counted instead as the whole
months of December, January and February in the Southern hemisphere and June,
July and August in the Northern hemisphere.
