CUT and COPY txt file

I have in c:\mydir\ this txt file:

AAAA-BBBB_04-05-2012.TXT
AAAA-BBBB_02-05-2013.TXT
AAAA-BBBB_02-06-2012.TXT

i need to cut from c:\mydir\ and copy in c:\mydir1\ all files based the current year -1 year.

in this case the file in question area:

AAAA-BBBB_04-05-2012.TXT
AAAA-BBBB_02-06-2012.TXT

note:
i need a fast code because in c:\mydir\ are approx 2.000 files::(