vmcore output shows a different date from the crashed time

Issue

• System crashed on 'Thu Dec 26 10:17:30 2013', but the vmcore shows 'Wed Dec 25 21:17:30'

..
        CPUS: 32
        DATE: Wed Dec 25 21:17:30 2013
      UPTIME: 49 days, 20:43:57
LOAD AVERAGE: 0.04, 0.06, 0.07
...
        TASK: ffff81403ff4a100  (1 of 32)  [THREAD_INFO: ffff81203fc00000]
         CPU: 7
       STATE: TASK_RUNNING (SYSRQ)