Grouping Listed Messages by Day

[Volkan YAZICI]

Hi,

[Forwarding from gnu.emacs.gnus[1].]

How can I group/cluster messages listed in the summary buffer
according to their day/week/month information?

Consider below threaded view.

E  [  20: Jared C. Davis         ] [Openmcl-devel] hash table resizing
E      [  49: Gary Byers             ]
E  [  30: Doug Currie            ] [Openmcl-devel] IDE nits
E      [  72: Gary Byers             ]
E      [  18: Gail Zacharias         ]
E  [  20: Ron Garret             ] [Openmcl-devel] Embedding CPython
E      [  35: Ian Eslick             ]
E          [  54: Ron Garret             ]

I want to group the posts according to their day of retrieval in a
similar fashion to below output.

---- 2009-08-01 ----
E  [  20: Jared C. Davis         ] [Openmcl-devel] hash table resizing
E      [  49: Gary Byers             ]
E  [  30: Doug Currie            ] [Openmcl-devel] IDE nits
E      [  72: Gary Byers             ]
E  [  20: Ron Garret             ] [Openmcl-devel] Embedding CPython
---- 2009-08-02 ----
E  [  72: Gary Byers             ] Re: [Openmcl-devel] IDE nits
E    [  18: Gail Zacharias         ]
E  [  35: Ian Eslick             ] Re: [Openmcl-devel] Embedding
CPython
E    [  54: Ron Garret             ]


Regards.

[1] 
http://groups.google.com/group/gnu.emacs.gnus/browse_frm/thread/797d30d14dfa068f