Pay attention to ETH contract traders—this year's triple witching day is scheduled for Friday the 19th in December. At the close of the US Eastern market (4:00 PM), futures, options, and perpetual contracts will all expire simultaneously, which is also the window when the market is most prone to volatility. Converted to domestic time, it’s early Saturday morning at 5:00 AM on December 20th. During those hours, large institutional hedging orders, retail stop-loss orders, and hedge fund position adjustments will all trigger in clusters. Historically, this period has not been calm, especially for large-cap cryptocurrencies like ETH, where volatility tends to be more pronounced. Mark this time in advance so you won't be caught off guard by sudden market moves.