Following the San Francisco 49ers "Sunday Night Football" victory over the Chicago Bears, game information for Week 18 is officially set.

The NFC West title and the conference's No. 1 seed will be decided on Saturday night in Santa Clara when the 49ers host the Seattle Seahawks at Levi's® Stadium. Kickoff is scheduled for 5 p.m. PT on January 3, with the primetime matchup airing nationally on ABC and ESPN.

With both teams winning their Week 17 contests, the regular-season finale now becomes a winner-take-all contest. The winning team will claim the NFC West title along with the conference's top seed, securing a first-round bye and home-field advantage throughout the NFC playoffs. The losing team will still advance to the postseason as a Wild Card. In the event of a tie, Seattle would take the division title.

The Seahawks vs. 49ers matchup will be one of two Saturday games in Week 18, alongside an afternoon contest between the Carolina Panthers and Tampa Bay Buccaneers that will determine the NFC South champion. The weekend's other standalone game features the Baltimore Ravens and Pittsburgh Steelers battling for the AFC North title on Sunday night.

Saturday's primetime game at Levi's® Stadium will also mark a historic first for the 49ers. San Francisco will debut its new Rivalries uniform on the field for the first time this season. Fans are encouraged to wear black to match the moment.

"I know the crowd is going to go crazy," defensive back Deommodore Lenoir said. "This is all everybody has been asking about."

Rivalries Uniform Highlights

• Helmet: A first-of-its-kind midnight black shell with red stripes and a gold-coated facemask.
• Jersey & Pants: All-black with red stripes, bold red numbers outlined in gold, featuring custom Saloon style numbering inspired by the 49ers historic wordmark.
• Faithful Script: A stitched script beneath the front collar honoring the loyalty of 49ers fans worldwide.

With a division title and the No. 1 seed on the line, plus a new look debuting under the lights, Saturday night sets the stage for one of the biggest regular-season games in Levi's® Stadium history.

Get your tickets to Week 18 Seahawks vs. 49ers here.