Knowledgebase

Daylight Savings on Smartnode

• On the SmartNode a timezone and a DST rule can be defined. For Daylight Saving Purposes there can be Timers defined which adjust the Timezone Offset according to the Daylight Savings Rule.
• The Rules which can be applied are like
  • last Sunday of October
  • first Saturday of March
  • second Sunday of April
  • first Sunday after March 20
• Determine Rule
  • ask your government or find on a website the Rule according which in your Timezone Daylight Saving is handled
    
    

Example for Switzerland

• Switzerland is in timezone GMT+1
• Daylight savings shift the clock about one hour to GMT+2
• Daylight savings begins on last sunday in march at 02:00
• Daylight savings ends on last sunday in october at 03:00
• Two clock comands are rquired: first command defines the standard time zone, second command sets the daylight time zone including the day light period.
  

Smartware Example:

clock local default-offset +01:00
clock local dst-rule DST_SUMMER +02:00 from 02:00 mar last sunday until 03:00 oct last sunday

Trinity Example:

clock local default-offset +01:00
clock local dst-rule SUMMER +01:00 from mar last sunday 02:00 2000 until oct last sunday 03:00 2036

• Show timers to see that the switching will be on the right date

  SmartNode(cfg)#show clock
  -------------------------------------------
  Local time         2013-11-07T12:12:31
  UTC                2013-11-07T11:12:31
  Offset             +01:00
  -------------------------------------------