Patriots' Day Library Hours: Monday, April 18 By Melissa Feiden on April 15, 2011 in All news On Monday, April 18, 2011, the following libraries will open at noon (12pm): Barker Dewey Hayden (Humanities & Science) Music Rotch All other library locations will be closed. Libraries resume regular hours on Tuesday, April 19. Have questions? Ask Us! Good luck, Boston Marathoners!