![]() From east to west they are Atlantic Standard Time (AST), Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and Chamorro Standard Time (UTC+10). The United States uses nine standard time zones. A new federal law took effect in March 2007 which extends Daylight Saving Time by four weeks. Eastern Standard Time (EST) becomes Eastern Daylight Time (EDT), and so forth. The names in each time zone change along with Daylight Saving Time. On the first Sunday in November areas on Daylight Saving Time return to Standard Time at 2:00 a.m. local time on the second Sunday in March. In the United States Daylight Saving Time begins at 2:00 a.m. Virgin Islands and American Samoa do not observe Daylight Saving Time. In places not observing Daylight Saving Time the local UTC or GMT offset will remain the same year round. As a result, their UTC or GMT offset would change from UTC -5h or GMT - 5h to UTC -4h or GMT - 4h. In areas of the United States that observe Daylight Saving Time local residents will move their clocks ahead one hour when Daylight Saving Time begins. Coordinated Universal Time is also known Zulu Time or Z time. The usage of UTC and GMT is based upon a twenty four hour clock, similar to military time, and is based upon the 0 degrees longitude meridian, referred to as the Greenwich meridian in Greenwich, England.Ĭoordinated Universal Time is based on cesium-beam atomic clocks, with leap seconds added to match earth-motion time, where as Greenwich Mean Time is based upon the Earth's rotation and celestial measurements. UTC+5h or GMT +5h would refer to that time zone being five hours ahead of UTC of GMT and so forth for the other time zones. In this example the (-5h) refers to that time zone being five hours behind UTC or GMT and so forth for the other time zones. You will often see time zones represented similar to UTC - 5h or GMT - 5h. Coordinated Universal Time replaced the use of Greenwich Mean Time (GMT) in 1972. That's why changing time zones doesn't affect when your ads serve.Coordinated Universal Time (UTC) is used as the official world reference for time. When you change your time zone in Campaign Manager 360, all you really change is how the interface displays Greenwich Mean Time (GMT), or world time: it translates GMT into the corresponding local time you set with the time zone menu. Keep in mind that time zone selections don't change when ads start/stop serving, when creatives rotate, or any other kind of scheduling. Any ad start time of 12:00 pm changes to 6: 00 pm - that's the shift from New York time to Paris time. E.g., ad start times in all your accounts shift forward 6 hours. ![]() The Paris time zone is 6 hours ahead of New York, so all affected fields shift forward 6 hours. Example: Say you change your Campaign Manager 360 time zone from New York -05:00/-04:00 to Paris +01:00/+2:00.Your setting affects many fields across the application. Click Time zone beneath your time zone to view the time zone menu. It doesn't affect your ads, it just translates dates/times into the time zone your select.Ĭhoose a time zone: Click the settings icon in the upper right (looks like a gear). The time zone menu is just for display purposes. This can help you check the local time in a particular region when you manage ads and creatives. ![]() You can temporarily change the time zone Campaign Manager 360 uses to display dates/times in the interface. ![]()
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