Illuminations Holiday Tour Saturday, December 15 Tour times: 4:30, 5:00, 5:45, 6:15, 7:00, 7:30, 8:15, 8:45, 9:15 Tickets on sale at McIntyre and Moore Booksellers, 255 Elm Street, Davis Square More info Fighting off a raging case of Seasonal Affective Disorder? Somerville has a cure. The city's residents know how to decorate, and when it's the holidays they want to share their spirit with everyone. The Somerville Arts Council will be offering 45-minute-long trolley tours......

The Madonna Project 2007 calendars (along with other wares) are still on sale. Somerville residents can grab their very own calendar for a discount and free delivery by the creator for a limited time. It's two bucks more plus shipping for people living outside of Somerville to get their own calendar featuring religious icons in Somerville lawns. Bostonist caught a glimpse of a billboard while heading back into Boston from the South Shore this weekend......

Once again, the Somerville Arts Council is justifying the thousands of holiday light sets purchased on clearance last year by all the "Griswalds" of the world by hosting their annual Illuminations Holiday Tour. The tour goes round trip from Somerville city hall, lasts 45 minutes, and "celebrates the folk-artistry of the many city residents who transform their houses and yards with lights, illuminated ornaments, and shrines of devotion and fantasy during the darkest time......