CyberData 011113 Operation Manual page 68

Table 2-20
•
Time Zone String
Part
CST6CDT
CST
6
CDT
M3.2.0/2:00:00
M3
.2
.0
/2:00:00
M11.1.0/2:00:00
M11
.1
.0
/2:00:00
Time Zone String
Table 2-21
Examples
Time Zone
Tokyo
Berlin
a.Tokyo does not use daylight savings time.
b.For Berlin, daylight savings time starts on the last Sunday in March at
01:00 UTC, and ends on the last Sunday in October at 01:00 UTC, and is one
hour ahead of UTC.
Time Zone Identifier A user-definable three or four character time zone identifier (such as PST, EDT, IST, MUT, etc) is
needed at the beginning of the posix time zone string to properly set the time. However, the specific
letters or numbers used for the time zone identifier are not important and can be any three or four
letter or number combination that is chosen by the user. However, the time zone identifier cannot be
blank.
You can also use the following URL when a certain time zone applies daylight savings time:
http://www.timeanddate.com/time/dst/2011.html
Operations Guide
shows a breakdown of the parts that constitute the following time zone string:
CST6DST,M3.2.0/2:00:00,M11.1.0/2:00:00
Meaning
The time zone offset from GMT and three character identifiers for the time zone.
Central Standard Time
The (hour) offset from GMT/UTC
Central Daylight Time
The date and time when daylight savings begins.
The third month (March)
The 2nd occurrence of the day (next item) in the month
Sunday
Time of day to change
The date and time when daylight savings ends.
The eleventh month (November)
The 1st occurrence of the day (next item) in the month
Sunday
Time of day to change
has some more examples of time zone strings.
Table 2-21. Time Zone String Examples
a
b
Figure 2-30. Three or Four Character Time Zone Identifier
Table 2-20. Time Zone String Parts
Time Zone String
IST-9
CET-1MET,M3.5.0/1:00,M10.5.0/1:00
930915D
Installing the VoIP Indoor Intercom with Keypad
CyberData Corporation
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Intercom Setup