Province debuts a new time zone code this autumn No time zone change for BC this fall. File photo. The province of British Columbia eliminated the twice-yearly time changes that have been in place since the 1930's last March, and just this month have announced a new abbreviation for the new time zone. According to a press release from the province, Pacific Time will now be known as PCT in operational and communications systems. This replaces the former PDT (Pacific Daylight T