Time zones
Time zone settings affect the local time and potential summer time changes for a specific
region. Time zones are measured by the time ahead or behind Greenwich Mean Time (GMT)
and expressed as Universal Time Coordinated (UTC) with a positive or negative sign
and a number representing hours.
The time zone setting has the following characteristics:
- The time zone setting does not adjust for Daylight Savings Time; the summer-time settings must be manually configured.
- Changing the time zone on a device updates the local time zone setup and is reflected in local time calculations.
- By default, all devices are in the Greenwich Mean Time (GMT) time zone (0,0).
- Time zone settings persist across failover for high availability.
- Time zone settings are not affected by Network Time Protocol (NTP) server synchronization.
The usual GMT plus or minus hours configuration is supported. To make time zone configuration simpler, some geographical regions have been assigned a time zone identifier. The following tables display the time zone identifiers with their descriptions for Europe, USA, and Australian time zones.
European Time Zones
| Time Zone | Description |
|---|---|
| GMT | Greenwich Mean Time, UTC |
| BST | British Summer Time, UTC + 1 hour |
| IST | Irish Summer Time, UTC + 1 hour |
| WET | Western Europe Time, UTC |
| WEST | Western Europe Summer Time, UTC + 1 hour |
| CET | Central Europe Time, UTC + 1 hour |
| CEST | Central Europe Summer Time, UTC + 2 hours |
| EET | Eastern Europe Time, UTC + 2 hour |
| EEST | Eastern Europe Summer Time, UTC + 3 hours |
| MSK | Moscow Standard Time, UTC + 3 hours |
| MSD | Moscow Summer Time, UTC + 4 hours |
USA Time Zones
| Time Zone | Description |
|---|---|
| Eastern | Eastern Standard Time, UTC - 5 hours |
| Michigan | UTC - 5 hours |
| Central | Central Standard Time, UTC - 6 hours |
| East-Indiana | UTC - 6 hours |
| Mountain | Mountain Standard Time, UTC - 7 hours |
| Arizona | UTC - 7 hours |
| Pacific | Pacific Standard Time, UTC - 8 hours |
| Alaska | Alaska Standard Time, UTC - 9 hours |
| Aleutian | UTC - 10 hours |
| Hawaii | Hawaii Standard Time, UTC - 13 hours |
| Samoa | UTC - 11 hours |