Sql server stores the internal representation of the DATE
data type as the big endian count of days from 1 Jan 0001
.
So 0x83360B00 is
SELECT 0x83 + 0x36 * 256 + 0x0B * 65536
= 734851 days
Add these back:
DECLARE @Date DATE = '1 Jan 0001'
SELECT DATEADD(dd, 734851, @Date)
Which returns:
2012-12-15