Expedia - $50 Off $500 on Hotels

It means booking during this period.

How to Redeem Your Expedia Coupon (not all properties eligible):
Sign in to your account.
Find a hotel or flight + hotel package. (Exclusions may apply. Please see coupon details for non-eligible hotels and packages.)
On the Payment page, under "How would you like to pay?" please click on "Enter a coupon or promotion code."
Enter the code, click "Apply Coupon," and complete the rest of the purchase.

//@Anonymous: Is it for the booking made in the week of 2/7 or the dates staying in the week of 2/7? Also, I did not see a place to put promotion code in Expedia, please advise. Thanks.

Is it for the booking made in the week of 2/7 or the dates staying in the week of 2/7? Also, I did not see a place to put promotion code in Expedia, please advise. Thanks.