solstice

 
Pronunciation: /ˈsɒlstɪs/

noun

  • either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.

Derivatives

solstitial

Pronunciation: /sɒlˈstɪʃ(ə)l/
adjective

Origin:

Middle English: from Old French, from Latin solstitium, from sol 'sun' + stit- 'stopped, stationary' (from the verb sistere)