SQL Insert Date Mystery on 2012 from 2005

I have migrated a 2005 db to 2012

There is a stored procedure that run to insert todays date into a table

IF NOT EXISTS(SELECT * FROM tblTime WHERE [Day] = DATEPART(day,GETDATE())
                                    AND [Month] = DATEPART(month,GETDATE())
                                    AND [Year]= DATEPART(year,GETDATE()) )
BEGIN
    INSERT INTO tblTime (Period,[Day],[Month],[Year],MonthPrefix)
        VALUES (CONVERT(VARCHAR(10), GETDATE(), 105),
                DATEPART(day,GETDATE()),
                DATEPART(month,GETDATE()),
                DATEPART(year,GETDATE()),
                CASE DATEPART(month,GETDATE()) 
                    WHEN 1 THEN 'JAN'
                    WHEN 2 THEN 'FEB'
                    WHEN 3 THEN 'MAR'
                    WHEN 4 THEN 'APR'
                    WHEN 5 THEN 'MAY'
                    WHEN 6 THEN 'JUN'
                    WHEN 7 THEN 'JUL'
                    WHEN 8 THEN 'AUG'
                    WHEN 9 THEN 'SEP'
                    WHEN 10 THEN 'OCT'
                    WHEN 11 THEN 'NOV'
                    WHEN 12 THEN 'DEC'
                    END
                )
END

When this is run on the new 2012 SQL box the date gets put in as

2015-12-06 00:00:00

But the same SP on the old 2005 would read

2015-06-12 00:00:00

I have checked that the 2 servers have the same language settings etc.

But is there something I have missed.

Many thanks for reading.