User guide

Time Zone
280 BLACK BOX ® Advanced Console Server
Time Zone
The content of the file /etc/TIMEZONE can be in one of two formats. The first format is used
when there is no daylight savings time in the local time zone:
std offset
The std string specifies the name of the time zone and must be three or more alphabetic char-
acters. The offset string immediately follows std and specifies the time value to be added to
the local time to get Coordinated Universal Time (UTC). The offset is positive if the local
time zone is west of the Prime Meridian and negative if it is east. The hour must be between 0
and 24, and the minutes and seconds must be between 0 and 59.
The second format is used when there is daylight savings time:
std offset dst [offset],start[/time],end[/time]
There are no spaces in the specification. The initial std and offset specify the Standard Time
zone, as described above. The dst string and offset specify the name and offset for the corre-
sponding daylight savings time zone. If the offset is omitted, it defaults to one hour ahead of
Standard Time.
The start field specifies when daylight savings time goes into effect and the end field specifies
when the change is made back to Standard Time. These fields may have the following for-
mats:
The time fields specify when, in the local time currently in effect, the change to the other
time occurs. If omitted, the default is 02:00:00.
Jn This specifies the Julian day, with n being between 1 and 365. February 29 is
never counted even in leap years.
n This specifies the Julian day, with n being between 1 and 365. February 29 is
counted in leap years.
Mm.w.d This specifies day, d (0 < d < 6 ) of week w (1 < w < 5) of month m (1 < m <
12). Week 1 is the first week in which day d occurs and week 5 is the last week
in which day d occurs. Day 0 is a Sunday.