The Radio Amateurs of Canada (RSC) Winter contest starts at 0000z Dec 17th, Friday evening in the US. Modes are CW and phone, exchange for non-Canadian stations is RS(T) and QSO serial number. Everyone can work everyone but working Canadian stations gets you 5 or 10 times as many points. Full rules
here.
I usually do CW only but this is a fun one to make some SSB QSOs in, as everyone is very friendly and in the holiday spirit.
73 John K3TN