Airline passengers may pay a pretty penny for priority boarding, but Alaska Airlines will let flyers wearing ugly sweaters board early on Dec. 21 in honor of National Ugly Holiday Sweater Day. This is the second year in a row the airline has celebrated the viral day.

Passengers are encouraged to tweet photos and videos of themselves getting into the holiday spirit with the hashtags #UglySweaterDay and #iFlyAlaska.

It’s also playing holiday-themed boarding music and free holiday movies onboard throughout the month.

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