Setup & Configuration
HDE-VoIP Telephones
Page 39
13. Appendix A Time Zone Settings
The
posix t
i
me zone
string tells
the internal
date and
time utilit
i
es
how to handle
day
li
ght sav
i
ngs
time for
different time
zones
.
Shown below are some common strings
.
Common Time Zone Strings
Time Zone
Time Zone String
US Pac
i
fic Time
PST8PDT
,
M3
.
2
.
0
/
2
:
00
:
00
,
M11.1.0
/
2
:
00
:
00
US
Mounta
i
n Time
MST7MDT
,
M3
.
2.0
/
2:00
:
00
,
M11
.
1.0
/
2
:
00:00
US
Eastern Time
EST5EDT
,
M3
.
2
.
0
/
2
:
00
:
00
,
M11
.
1.0
/
2
:
00
:
00
Phoenix Ar
i
zonaª
MST7
US Central
Time
CST6DST
,
M3.2
.
0
/
2
:
00:00
,
M11
.
1
.
0
/
2
:
00
:
00
a.
Ph
oenix, Arizo
na doe
s
not
u
s
e daylight
s
aving
s time.
Shown below is a breakdown of the parts that const
i
tute
the follow
i
ng time zone string
:
•
CST6XXX,M3
.
2
.
0/2:00:00
,
M11.1.0/2:00:00
Time Zone String Parts
Time Zone String
Meaning
Part
CST6CDT
The time zone offset from GMT and three character identifiers for the time zone.
CST
Central Standard Time
6
The (hour) offset from GMT/UTC
XXX
Any three letters
M3.2.0/2:00:00
The date and time when daylight savings begins.
M3
The
th
i
rd month
(March)
.
2
The 2nd
occurrence
of
the day (next
i
tem)
in the
month
.
0
Sunday
/2:00:00
Time of day to change
M11.1.0/2:00:00
The date and time when daylight savings ends.
M11
The eleventh month (November
)
.
1
The 1st
occurrence of
t
he
day
(
next item)
i
n the
month
.0
Sunday
/2:00:00
Time of day to change
More examp
l
es of time zone str
in
gs.
Time Zone String Examples
Time Zone
Time Zone String
Tokyo
a
IST-9
Berlin
b
CET-1
MET,M3.5.0/1
:
OO
,
M10.5
.
0
/
1
:
00
a. Tokyo
does
not use
daylight
savings time
.
b
.
For
Berlin
,
daylight savings
time starts on
the
last
Sunday in
March at 01:00 U
T
C,
and
en
d
s
on
the
last Sunday in
October at 01
:
00
UTC, an
d
is one hour ahead of
UTC.
