Seasons and more

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Across
  1. 2. the warmest season of the year, in the northern hemisphere from June to August and in the southern hemisphere from December to February
  2. 4. each of the four divisions of the year (spring, summer, autumn, and winter) marked by particular weather patterns and daylight hours, resulting from the earth's changing position with regard to the sun
Down
  1. 1. The time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days (about 21 June and 22 December)
  2. 3. The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about 22 September and 20 March)