First, there was the post-Thanksgiving sales spectacle Black Friday and then the online version, Cyber Monday. Now, charitable groups have started a new holiday tradition — it’s called Giving Tuesday. It may seem a little surprising that no one came up with the idea before of designating a specific day to help launch the holiday charitable giving season. Giving Tuesday is the brainchild of the 92nd Street Y, a nonprofit cultural and community center in New York. The group has an anonymous donor who will match contributions up to a total of $50.000. Organizers hope that passion will be contagious at a time when charitable giving has been relatively flat and as nonprofits struggle to find new donors. Website: http://givingtuesday.org/ It’s just the right thing to do