​Calendar: Week of December 15

Here's a look at the week ahead on our "Sunday Morning" Calendar:

Monday is the deadline for signing up for coverage starting January 1st under the Affordable Care Act.

Tuesday at sundown marks the beginning of Hanukkah, the Jewish Festival of Lights.

Wednesday is the 25th anniversary of the first half-hour episode of "The Simpsons," entitled "Simpsons Roasting on an Open Fire."

By contrast, Thursday sees the final episode of "The Colbert Report" on Comedy Central, as host Stephen Colbert moves on to succeed David Letterman as host of "The Late Show" here on CBS next spring.

Friday sees the premiere of "Night at the Museum: Secret of the Tomb," with performances by Robin Williams and Mickey Rooney, both of whom died earlier this year.

And Saturday is projected by the firm ShopperTrak to be the busiest shopping day of the holiday season, bumping the Friday after Thanksgiving down to third place. The day AFTER Christmas is predicted to be the second-busiest shopping day