It's been 10 years since Thanksgivukkah -- the rare convergence of Thanksgiving and Hanukkah -- revolutionized the Jewish-American holiday experience. Thanksgivukkah itself was a calendar rarity that won't happen again for another 80,000 years. Turning the coincidence into a communal event was the brainchild of Dana Reichman Gitell, a marketing professional living in the Greater Boston area. Her lighthearted idea for a holiday mashup became a Jewish-American merchandising, culinary and even spiritual bonanza.