McDonald's is currently smack dab in the middle of an epic 20 days of deals. It's called the "SZN for Sharing" and almost every day for the last couple of weeks, fans of the fast food joint have been enjoying a great deal after a great deal.

The one they're offering today and tomorrow might be the best one yet.

McDonald's is offering its Double Cheeseburgers for just 50 cents from December 22 to 23. Yep, you read that right -- two round quarters!

McDonald's
McDonald's
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So, what's the catch?

OK, so yeah, there is a bit of fine print involved. But, it's not too difficult.

To score this super deal, you'll need the McDonald's app.

Simply download the McDonald's app and order your food there. Be sure to click the offer tab to score this super-value good deal.

By purchasing anything over $1 on the McDonald's app, you will be eligible to participate in their mega sweepstakes to win a coveted McDonald's Gold Card.

What does this McGold card get you?

Simply put, it's free McDonald's for the rest of your life.

Whoever wins the McGold card will also be able to share the prize with three of their friends or family members.

According to the official rules of the contest, the card will get the winner the equivalent of two meals per week for 50 weeks.

LOOK: The top holiday toys from the year you were born

With the holiday spirit in the air, it’s the perfect time to dive into the history of iconic holiday gifts. Using national toy archives and data curated by The Strong from 1920 to today, Stacker searched for products that caught hold of the public zeitgeist through novelty, innovation, kitsch, quirk, or simply great timing, and then rocketed to success.

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