If you want to configure time zone on a ubuntu machine, do the following:
Pick “Pacific Ocean” for Pacific Time.
Do NOT pick “Pacific-New”; it is some failed US bill.
“The U.S. House of Representatives passed a bill in April 1989 that would have delayed the end of Pacific daylight time in presidential election years until after the November election, with the intent of narrowing the gap between when the predictions from the rest of the continental United States start pouring in and when the polls close in California. The bill was never signed”