Description: This attribute indicates when to change to and from daylight saving (or summer) time. The value has the form: date1/time1,date2/time2,offset

The first date describes when the change from standard to daylight saving time occurs, and the second date describes when the change back happens. Each time field describes when, in current local time, the change to the other time is made.

The format of date is the following: m.w.d The dth day (0 <= d <= 6) of week w of month m of the year (1 <= w <= 5, 1 <= m <= 12, where week 5 means 'the last d day in month m', which may occur in the fourth or fifth week). Week 1 is the first week in which the dth day occurs. Day zero is Sunday. The time format is the following: hh:mm The offset value is the value you must add to the local time to arrive at UTC Time during the daylight saving time. The offset value has the following format: hh[:mm].