(CNN) As Black Friday draws closer, stores are releasing their plans for the most frenzied day of the holiday shopping season. Here's a look at the schedules released by major retailers so far. This list will be updated.

JCPenney

JCPenney will begin its Black Friday sale at 3 p.m. Thanksgiving Day, and will stay open Friday until 10 p.m. Online sale prices begin a day earlier, at midnight Nov. 23.

Walmart

Most Walmart stores are already open 24 hours. But the big box retailer will begin its Black Friday event at 6 p.m. on Thanksgiving.

Target

Target will open its doors at 6 p.m. on Thanksgiving. It also is bringing back its 10 Days of Deals and Black Friday Presale promotions.

Related: Walmart, Target, Best Buy roll out Black Friday deals

Best Buy

The electronics store will open at 5 p.m. on Thanksgiving and close at 1 a.m. early Friday. Best Buy reopens at 8 a.m. Black Friday, and has additional online deals

Sears

Sears is advertising Thanksgiving hours from 6 p.m. to midnight, though the company says some stores will be closed on the holiday. All stores will open at 5 a.m. on Black Friday, and doorbuster sales will be available online on Thanksgiving and in stores and online until 1 p.m. Black Friday while supplies last.

Toys R Us

The toy giant will open its doors at 5 p.m. Thanksgiving and will remain open for 30 hours straight.

Macy's

Macy's is kicking off its Black Friday sales at 5 p.m. on Thanksgiving Day, an hour earlier than the prior two years. Most will stay open until 2 a.m., close for four hours, and reopen at 6 a.m. for Black Friday.