In addition to being the shortest month of the year, February is not rich in holidays and weekends, which allows traders to work almost non-stop. Besides, markets become more active following January's lull.
Changes in trading hours will affect only the largest stock exchanges in the US, Canada, and Japan.
Their equity markets will be closed for trading in observance of national holidays.
As for foreign exchange markets, there will be no holiday breaks in February except for regular weekends.
US Presidents Day - the NASDAQ and NYSE stock exchanges are closed. CME trading is available until 9 PM (GMT+3).
#NDX (NASDAQ-100) is unavailable
Family Day in Canada - the Toronto Stock Exchange is closed
Emperor's Birthday in Japan - the Tokyo Stock Exchange is closed
#N225(Nikkei 225) is unavailable