Patriot's Day is April 19th; however, it's celebrated on the third Monday of each April in Massachusetts. This year Patriot's Day holiday is Monday, April 18, 2005. There will be celebrations and parades on Sunday, April 17, 2005, I believe.
As for the above-mentioned celebrations, there are two separate locations, two separate events, two different dates and times . . .
1.a.) April 16, 2005, on the eve of the celebration/parade - Is this event held in Concord-Lincoln on Battle Road, on Saturday, April 16, 2005, starting at 10:00 AM, National "Park Rangers of Minute Man National Historical Park" and others "will gather for a portrayal of the
eve before opening battle of our country's fight for independence (on April 19, 1775, 'the shot heard 'round the world')." (my bold-faced type emphasis)
1.b.) April 16, 2005, on the eve of the celebration/parade - And, at 2:00 (approximately) in the afternoon on the same date, re-enactors in Brit redcoats will be jumping through the Concord woods re-enacting "a weapons demonstration representing tactics deployed on April 19, 1775."
2.) Patriot's Day - celebrated on Sunday, April 17, 2005 will be the historically accurate Patriot's Day re-enactment which will start on The Lexington Green, Lexington, Massachusetts at dawn -- typically as memory serves me, at about 5:00 AM, together with
Revere/Dawes rides into Lexington from Boston.
Now, YOU try to be available with your wife and kids after packing your car or whatever and arriving at 5:00 o'clock in the morning plus traffic and parking (yes, there's those problems at 5:00 AM) in Lexington, Massachusetts. Or would you rather try it at the National Park in Concord, Massachusetts on a lovely Saturday late morning and afternoon? One is of historical significance and accuracy, while the other is of modern convenience and a grand time jumping through the Concord woods in King George's Redcoat uniforms.