If you’re traveling on Alaska Airlines on December 15 this year, be sure to wear your ugliest holiday sweater.

That’s because the airline is participating in National Ugly Holiday Sweater Day (yes, of course that’s a thing) and inviting passengers wearing festive holiday sweaters (the more outrageous, the better…) to board their flights early on December 15.

On that day, your ugly sweater will get you early boarding on all Alaska flights in their network and on Virgin American and Horizon Air flights as well.

To help set the mood, the airline is playing festive holiday-themed boarding music all month long.

“This fun promotion not only allows guests to board early on that day, but gives people another opportunity to dust off that ugly holiday sweater hanging in the back of their closet,” said Natalie Bowman, managing director of marketing and advertising at Alaska Airlines.

If you see an especially festive ugly sweater – or a gate hold full of them – on December 15, Alaska is encouraging travlers to post photos and vidoeos on Twitter using the hashtags #UglySweaterDay and #MostWestCoast.

And, of course, to arrive at the airport extra early.

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