Yes, they meet for 90 days starting I believe in the second week of January every year.
Per the GA website (http://mlis.state.md.us/nopro.htm), starts 09JAN2013.
Per the GA Interim Calendar (http://mlis.state.md.us/2012rs/misc/2012InterimDates.pdf):
- Starts: 09JAN2013
- Sine Die: 08APR2013