Before this moment millions of applications will need to either adopt a new convention for time stamps or be migrated to 64-bit systems which will buy the time stamp a "bit" more time. On this date the Unix Time Stamp will cease to work due to a 32-bit overflow. This is very useful to computer systems for tracking and sorting dated information in dynamic and distributed applications both online and client side. It should also be pointed out (thanks to the comments from visitors to this site) that this point in time technically does not change no matter where you are located on the globe. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch. Best time for a conference call or a meeting is between 8am-1pm in EST which corresponds to 1pm-6pm in UTC. 10:30 am in EDT is 2:30 pm in UTC and is 10:30 am in EDT. This count starts at the Unix Epoch on January 1st, 1970 at UTC. Eastern Daylight Time is 4 hours behind Universal Time Coordinated and 0 hours ahead of Eastern Daylight Time. Now, let us see how to use the AT TIME ZONE in a select query to fetch the UTC time and convert to different time zones.The unix time stamp is a way to track time as a running total of seconds. While using AT TIME ZONE, you have to specify the destination time zone in their respective names like Eastern Standard Time, Pacific Standard Time, etc… To get the respective time zone names, you can use the system T-SQL function sys.time_zone_info. Using AT TIME ZONE is an easy way to convert UTC date-time or DATETIMEOFFSET to your desired time zone in datetimeoffset format. From SQL Server 2016 and higher versions, we have a couple of techniques for converting time zones. Now we will see how to convert the date-time stored in UTC format to the local time zone. ID Order OrderedOn_LocalTime OrderedOn_DTOġ Bicycle 06:21:18.410 06:21:18.4219099 -04:00Ĭonverting UTC datetime to a local time zone VALUES ('Bicycle', GETDATE(), SYSDATETIMEOFFSET()) * Create a table with datetimeoffset(7) as one of the columns */ SYSDATETIMEOFFSET() returns a datetimeoffset(7) in which the time zone offset is included in the system date and time. Warning EST has automatically switched to EDT. Now we will see how to use SYSDATETIMEOFFSET() to get local date-time with offset to UTC and store it in the DATETIMEOFFSET column. In the previous techniques we have used GETUTCDATE() to get the current UTC date-time and store it in a DATETIME column. Thus the entered time is converted to UTC as “ 22:32:15″. To make this and UTC time, I have got the difference between GETDATE() and GETUTCDATE() in seconds and then added it to the user entered time. In the above example, the user entered time is “ 18:32:15″. VALUES ('Bike', Fetch and see the inserted record */ If a user enters a date time, you can find the difference between the current local and UTC time in seconds and add it to the user entered AS As DATETIME ĭATEDIFF(second, GETDATE(), GETUTCDATE()), INTO. In such a scenario, you can convert the user entered date and time to UTC using the DATEDIFF and DATEADD functions. However, you may need to store it in UTC. The user may enter the date and time according to his or her local time. Sometimes, you may need to store the user entered date and time. If you notice UTC time in column OrderedOn_UTC is 4 hours ahead of Eastern Time. In the above example, I have created a table with one column to store the local server date time (which is Eastern Time US & Canada) using GETDATE() and another column to store the current UTC date and time using GETUTCDATE(). ID Order OrderedOn_LocalTime OrderedOn_UTC VALUES ('Bicycle', GETDATE(), GETUTCDATE())
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