i am working on a server that time had set to local time.
when i type "SELECT UNIX_TIMESTAMP(),curdate();" , the curtime shows the right local time, but unix_timestamp shows 1 hour delay in GMT time.
i think something on the server set false.
anyone can help?

I think UNIX_TIMESTAMP will return negative numbers for some
times in timezones with a positive offset from GMT

so you can use

[mysqld_safe]
timezone = America/Los_Angeles