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It is the Saturday before St. Patrick's Day. Making it any other day, e.g. the ninth, would just be confusing.
I have no idea on the participants, so I will just list every place to get a beer in no particular order.
Max's On Main Mary Kelly's Restaurant & Pub The Barking Frog Joe's Irish Maroney's Hub The Hop Beacon Bank Square Coffeehouse The River Terrace Virgo's Sip-n-Soul Dogwood The Roundhouse at Beacon Falls Sukhothai Cafe Amarcord
Ref Ken's answer, St. Patrick's Day is Sunday, March 17 in 2013. While pub crawling, if you are bold, you can try some of Irish songs for St. Patrick's Day, including the great, "Seven Drunken Nights." Search "irish songs site:st-patricks-day.com." I don't have the cred' to publish a link for you.
Just in case you're still, confused, you know, like me, that makes the pub crawl this Saturday, March 16, 2013.