When it is 8 am in San Francisco what time Taiwan?

When the time is 8 am in San Francisco, United States, the time in Taiwan is will be 11 pm (next day).

San Francisco is located in the Pacific Time Zone (UTC−08:00), while Taiwan is located in the National Standard Time Zone (UTC+08:00). The time difference between San Francisco and Taiwan is therefore (UTC+08:00) - (UTC−08:00) = +16:00.