ArtWeek Boston runs April 29-May 8 at locations across Greater Boston. Event prices vary; many are free. artweekboston.org. Boston boasts a dynamic arts scene year round, but twice a year the city dedicates 10 full days to celebrating it. Now in its fourth year, ArtWeek Boston is a citywide festival of culture—from dance, theater and music to the literary and culinary arts—that’s spread to towns across Eastern Mass. This spring’s edition of the fest features more than 170 events, including a pop-up opera at Boston Public Market, a sneak peek of UrbanityDance (pictured here) in rehearsal for its spring revue, an “open runway” fashion show in Downtown Crossing and the debut of Light Up the Night, which will have Boston buildings of note illuminating in unison. Paint the town red, or any color at all, when ArtWeek hits town April 29-May 8.