diff --git a/sqlsrv/install.inc b/sqlsrv/install.inc
index f8e2bb8..cbb98ce 100755
--- a/sqlsrv/install.inc
+++ b/sqlsrv/install.inc
@@ -130,6 +130,92 @@ BEGIN
 END
 EOF
       );
+      // DATE_FORMAT() function.
+      $database->query(<<< EOF
+      IF OBJECT_ID (N'DATE_FORMAT', N'FN') IS NOT NULL BEGIN DROP FUNCTION DATE_FORMAT END
+EOF
+      );
+      $database->query(<<< EOF
+CREATE FUNCTION [dbo].[DATE_FORMAT] 
+(
+-- Add the parameters for the function here
+@Datetime DATETIME,
+@FormatMask VARCHAR(32)
+)
+RETURNS VARCHAR(32)
+AS
+BEGIN
+-- Declare the return variable here
+DECLARE @Result VARCHAR(32)
+
+-- Add the T-SQL statements to compute the return value here
+DECLARE @StringDate VARCHAR(32)
+
+SET @StringDate = @FormatMask
+
+IF (CHARINDEX ('YYYY',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'YYYY',
+DATENAME(YY, @Datetime))
+
+IF (CHARINDEX ('yy',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'yy',
+RIGHT(DATENAME(YY, @Datetime),2))
+
+IF (CHARINDEX ('MMMM',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'MMMM',
+DATENAME(MM, @Datetime))
+
+IF (CHARINDEX ('MMM',@StringDate)>0)
+SET @StringDate = REPLACE(@StringDate, 'MMM',
+LEFT(UPPER(DATENAME(MM, @Datetime)),3))
+
+IF (CHARINDEX ('MM',@StringDate COLLATE Latin1_General_CS_AS) > 0)
+SET @StringDate = REPLACE(@StringDate COLLATE Latin1_General_CS_AS, 'MM',
+RIGHT('0'+CONVERT(VARCHAR,DATEPART(MM, @Datetime)),2))
+
+IF (CHARINDEX ('M',@StringDate COLLATE Latin1_General_CS_AS) > 0)
+SET @StringDate = REPLACE(@StringDate COLLATE Latin1_General_CS_AS, 'M',
+CONVERT(VARCHAR,DATEPART(MM, @Datetime)))
+
+IF (CHARINDEX ('DDDD',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'DDDD',
+DATENAME(DW, @Datetime)) 
+IF (CHARINDEX ('DDD',@StringDate) > 0)
+SET @StringDate = LEFT(REPLACE(@StringDate, 'DDD',
+DATENAME(DW, @Datetime)),3)
+IF (CHARINDEX ('dd',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'dd',
+RIGHT('0'+DATENAME(DD, @Datetime),2))
+
+IF (CHARINDEX ('d',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'd',
+RIGHT(DATENAME(DD, @Datetime),2))
+
+IF (CHARINDEX ('ww',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'ww',
+DATENAME(WW, @Datetime)) 
+
+IF (CHARINDEX ('HH',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'HH',
+DATENAME(HH, @Datetime)) 
+--IF @StringDate > 12 SET @StringDate = @StringDate - 12
+
+IF (CHARINDEX ('mm',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'mm',
+RIGHT('0'+DATENAME(MI, @Datetime),2)) 
+
+IF (CHARINDEX ('ss',@StringDate) > 0)
+SET @StringDate = REPLACE(@StringDate, 'ss',
+RIGHT('0'+DATENAME(SS, @Datetime),2))
+
+SELECT @Result = @StringDate
+
+-- Return the result of the function
+RETURN @Result
+
+END
+EOF
+      );
       $database->bypassQueryPreprocess = FALSE;
     }
     catch (Exception $e) {