ANNE D'INNOCENZIOThis season could mark the end of Black Friday as we know it. For decades, stores have opened their doors in the wee hours on the day after Thanksgiving. But this year, major chains such as Target and Sears ushered in customers on Thanksgiving itself, even before the turkey leftovers had gotten cold, turning the traditional busiest shopping day of the year into a two-day affair. Despite an outcry from some employees, both stores and shoppers seemed to like it. Some people went shopping with a full belly, going straight from the dinner table to the stores. Others slept off their big meal and went to the mall before daybreak on Black Friday. "I ate my turkey dinner and came right here," said Rasheed Ali, a college student in New York City who bought a 50-inch TV for $349 and a sewing machine for $50 when Target opened at 9 p.m. on Thanksgiving. "Then I'm going home and eating more." This new approach could become a holiday shopping season tradition. "It's Black Thursday and Friday combined," said Jackie Fernandez, a retail expert at the consulting firm Deloitte. "This is going to be a new normal of how we shop." It won't be clear for a few days how many shoppers took advantage of the Thanksgiving hours. But about 17 percent of people said earlier this month that they planned to shop at stores that opened on Thanksgiving, according to an International Council of Shopping Centers-Goldman Sachs survey of 1,000 consumers. Meanwhile, 33 percent intended to shop on Black Friday, down 1 percentage point from last year. Overall, it is estimated that sales on Black Friday will be up 3.8 percent to $11.4 billion this year, according to technology company ShopperTrak, which did not forecast sales from Thanksgiving Day. The Black Friday creep began in earnest a few years ago when stores realized that sales alone weren't enough to lure shoppers, especially with Americans becoming more comfortable buying things online. Opening on Thanksgiving was risky, with some employees and shoppers complaining it was almost sacrilegious.