Appendices
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Page 53
Timezone specifier
Optionally enter a recognised timezone specifier related to the current position of the Wizard DXS - Digital unit. When an NTP
server is used, the specifier will be used to provide the correct real time.
The timezone specifier takes the following form:
std
offset
dst
[
offset
]
,
start
[
/
time
]
,
end
[
/
time
]
The
std
and
offset
specify the standard time zone, such as GMT and 0, or CET and -1, or EST and 5, respectively.
The
dst
string and
[
offset
]
specify the name and offset for the corresponding Daylight Saving Time zone; if the
offset
is omitted,
it defaults to one hour ahead of standard time.
The remainder of the specification describes when Daylight Saving Time is in effect. The
start
field is when Daylight Saving Time
goes into effect and the
end
field is when the change is made back to standard time. The most common format used for the
daylight saving time is:
M
m
.
w
.
d
Where:
m specifies the
month and must be between
1
and
12
. The day
d
must be between
0
(Sunday) and
6
. The week
w
must be between
1
and
5
; week
1
is the first week in which day
d
occurs, and week
5
specifies the
last
d
day in the month.
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
.
Typical examples are:
UK:
GMT0BST,M3.5.0/1,M10.5.0/2
Central Europe:
CET-1CEST,M3.5.0/2,M10.5.0/3
US Eastern:
EST5EDT,M3.2.0/2,M11.1.0/2
US Pacific:
PST5PDT,M3.2.0/2,M11.1.0/2
For further details
• For details of timezone specifier formats, please refer to:
http://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
• For details of the Network Time Protocol (main RFC number:
1305; the SNTP subset used as the basis for the Wizard DXS - Digital: 4330)
