NEC SigmaBlade N8406-040(F) User Manual page 151

Set area time dislplay setting or set the time difference from UTC (Universal Time Coordinated)
3.
NOTE:
The area time display setting of the 8G FC Switch is set to "JST" when the 8G FC
Switch is shipped from the factory. You need not change the setting if you use the 8G
FC Switch in Japan.
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