Once a rare and enticing perk, free shipping has practically become an expectation for online shoppers, especially around holiday time. So it’s little wonder that as many as 800 retailers will be offering free standard shipping on December 17, otherwise known as the second annual “Free Shipping Day.”

After December 17, you may still find some free shipping deals, but they will be fewer and fewer as December 25 nears. You may be able to get your holiday gifts where they're going as late as December 23, but it’s likely to cost you.