SQL Clone
SQLServerCentral is supported by Redgate
Log in  ::  Register  ::  Not logged in

Get your favorite SSC scripts directly in SSMS with the free SQL Scripts addin. Search for scripts directly from SSMS, and instantly access any saved scripts in your SSC briefcase from the favorites tab.
Download now (direct download link)

Get daylight savings time

By Langston Montgomery,



Hello everyone,


Many of us have come across cases where we need to convert a time (such as UTC) to local time, but what about those parts of the world where daylight savings time is observed?


This function will return the daylight savings date/time for a given year in accordance with historical records: http://www.energy.ca.gov/daylightsaving.html#chart


This way, no lookup tables are needed. All you have to know is what timezone you are converting from and to, because as long as you have the date when daylight savings begins/ends, then it should be fairly easy to write some case logic to convert the date. This script also contains an example of this function's use by converting UTC to PST.


Caveat: The function can return undesirable results if the SET DATEFIRST statement is set to anything other than Sunday.


Credits: Much credit to those out there who provided much of the crucial code that went into building this function.

Total article views: 1689 | Views in the last 30 days: 6
Related Articles

Daylight Saving in SQL Server 200

Daylight saving


SQL Server - Convert() function

Convert () function in SQL Server to convert an expression from one data type to another data type ...


Time Zones and Daylight Saving Time

Watch this week’s episode on YouTubeAT TIME ZONE is great because it makes it easy to perform daylig...


Convert Unix Date Time to Julian - DST

Convert Unix datetime to Julian and accommodate daylight savings time


How to convert an Access Last function to SQL Server

convert an Access Last function to SQL Server