What is the time difference between California and Czech Republic?

Answer 1

• From 10 AM UTC on the 1st Sun. of Mar. to 1 AM UTC on the last Sun. of Mar., Serbia (UTC+1) is 8 hours ahead of California (UTC-7).
• From 1 AM UTC on the last Sun. of Mar. to 1 AM UTV on the last Sun. of Oct., Serbia (UTC+2) is 9 hours ahead of California (UTC-7).
• From 1 AM UTC on the last Sun. of Oct. to 9 AM UTC on the 1st Sun. of Nov., Serbia (UTC+1) is 8 hours ahead of California (UTC-7).
• From 9 AM UTC on the 1st Sun. of Nov. to 10 AM UTC on the 2nd Sun. of Mar., Serbia (UTC+1) is 9 hours ahead of California (UTC-8).

4 AM PST (in California Nov-Mar) =
5 AM PDT (in California Mar-Nov) =
1 PM CET (in Serbia Oct-Mar) =
2 PM CEST (in Serbia Mar-Oct)

Answer 2

Brazil is four hours ahead of California.

Answer 3

10 hours