To set your web servers date timezone, for example for Eastern Standard Time (EST) use the following code:
SetEnv TZ America/Indianapolis |
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For example, for Los Angeles time (Pacific time), use the following code:
SetEnv TZ America/Los_Angeles |
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Other location examples include:
America/New_York - Eastern Time America/Detroit - Eastern Time - Michigan (most locations) America/Louisville - Eastern Time (Louisville, Kentucky) America/Indianapolis - Eastern Standard Time (Indiana, most locations) America/Indiana/Marengo - Eastern Standard Time (Indiana, Crawford County) America/Indiana/Knox - Eastern Standard Time (Indiana, Starke County) America/Indiana/Vevay - Eastern Standard Time (Indiana, Switzerland County) America/Chicago - Central Time America/Menominee - Central Time (Michigan, Wisconsin border) America/Denver - Mountain Time America/Boise - Mountain Time (South Idaho, East Oregon) America/Shiprock - Mountain Time (Navajo) America/Phoenix - Mountain Standard Time (Arizona) America/Los_Angeles - Pacific Time America/Anchorage - Alaska Time America/Juneau - Alaska Time (Alaska panhandle) America/Yakutat - Alaska Time (Alaska panhandle neck) America/Nome - Alaska Time (west Alaska) America/Adak - Aleutian Islands Pacific/Honolulu - Hawaii |
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For European and other timezones it is best to contact the system administrator for further instruction.
Source ; http://www.htaccess-guide.com/setting-server-timezone/