Effective 01OCT08, Cathay Pacific will reduce the frequencies on Hong Kong - Vancouver route.
CX835/836 on Day 57 will not be operated from 01OCT08 to 25OCT08.
From 26OCT08, service on CX835/836 will reduce to 3 weekly (Day 146), totals 17 weekly.
Source:
http://airlineroute.blogspot.com/
CX828/829 seems also to be zeroed out in the winter