the clock here is 9 hours ahead of the clock in california

Addendum:
CA 7am = SLO 4pm
CA 10am = SLO 7pm
CA 1pm = SLO 10pm

In summary, if you live on the west coast, the best hours to call are between 7am and 1pm (your time). Or late at night--anytime after 10pm.

CA 10pm = SLO 7am