Partition by year and month

[IGGt .]

I am looking to create a database containing our monthly data (at the moment it gets archived away and restored when needed), and I think that a Partitioned table would be ideal, as I can add the data for every month for the past xx years, and still have a searchable table for querying (hopefully). But, I can't get the create query to work how I expected.

What I have is:
CREATE TABLE archive (c1 DATE)
PARTITION BY RANGE( YEAR(c1) )
SUBPARTITION BY RANGE( MONTH(c1) )
SUBPARTITIONS 12 (
PARTITION p2007 VALUES LESS THAN (2008),
PARTITION p2008 VALUES LESS THAN (2009),
PARTITION p2009 VALUES LESS THAN (2010),
PARTITION p2010 VALUES LESS THAN MAXVALUE
);

The idea being I would have a partition for each year, and a subpartition for each month.

It seems to be complaining at the "RANGE( MONTH(c1) )" stage