I've just discovered how to do it, I've posted what I've found below
set @sDayofWeek = datename(weekday,'10/11/2005') -- returns "Tuesday"
set @sDayofWeek = datename(day,'10/11/2005') -- returns "10"
set @sDayofWeek = datename(month,'10/11/2005') -- returns "November"
set @sDayofWeek = datename(year,'10/11/2005') -- returns "2005"