One of the mysteries of the English language finally explained.
1Usually with the. Midnight, with reference to the belief that witches are active and magic takes place at that time. More generally: the time, especially the dead of night, when bad or sinister things are believed to be most likely to happen.
2Originally and chiefly US. The last hour of trading each month when exchange-traded stock options expire, causing increased trading activity and volatility in the market.
Mid 18th century. From witching + hour.
witching hour/ˈwɪtʃɪŋ ˌaʊə/
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