In recent years, the lefty activist group Time's Up has been widely associated with the monthly Critical Mass bicycle rides in Manhattan—a source of ongoing acrimony between police and cyclists. But the group, started by environmental activist Bill DiPaola back in 1987, has had a green finger in a wide array of progressive causes beyond cycling advocacy. Now Time's Up's wide-ranging agenda over the past two decades has been underscored by the recent acquisition of a trove of Time's Up documents by the Tamiment Library at NYU.

The archive will include fliers, street posters, videotapes, calendars, and other documents dating back to the 80's, ranging from announcements about demonstrations for first amendment rights to campaigns to save community gardens. March defiantly further down memory lane by checking out the Time's Up poster set on Flickr and the Time's Up time line.