script to Find the files based on dates it came

I need a script to get the files for DEC
the file format will be
B20_abc_ancdfefg_20101209_INCR_201012100145.TXT.gz

Based on the bold ones (date) i need to get the files

can any one help me plzzzzzz

To list all the file names for December 2010 .

ls -1 B20_abc_ancdfefg_20101209_INCR_201012???????.TXT.gz
ls *INCR_20101210*

more specific search

ls *INCR_20101210*TXT.gz