Light Up Night is the official kick-off of the holiday season in Pittsburgh, so Christmas fans, rejoice: With crowds pouring downtown for the annual festivities on Friday night, it’s finally OK to string up the holiday lights and wreaths. For inspiration, head to Upper St. Clair for a Symphony Splendor Holiday Home Tour, benefitting the Pittsburgh Symphony Orchestra. Pretend like you’re in a Lifetime Christmas movie as you soak in the holiday decor, while listening to PSO musicians at each stop.