If Christmas is a secondary celebration in Hong Kong, one festival is of the utmost importance in China (including Hong Kong): Lunar New Year. Or, as Westerners call it, Chinese New Year.
And, if you don’t know how important that day is, don’t count on Hong Kong and its citizens to remind you that Lunar New Year is one of the cornerstones of the Chinese tradition.
As a matter of fact, a foreigner who’d visit Hong Kong around the time of Lunar New Year -or even on Lunar New Year’s Day- wouldn’t realize New Year is coming. Unless someone told him, that is.