Same as Time::gm, but interprets the values in the local time zone.
Time.local(2000,"jan",1,20,15,1) #=> 2000-01-01 20:15:01 -0600Time.local(year) => time
Time.local(2000,"jan",1,20,15,1) #=> 2000-01-01 20:15:01 -0600
修改ubuntu时区为cst之后很适合国人使用Time.local