How do I select my check-in date?

When doing a search for a room reservation, clicking on the check-in date field will display a pop-up calendar.

Your desired check-in date is selected by clicking on a date on the calendar. If you are looking for a different month/year than what is initially indicated, clicking the left and right arrows will allow you to navigate forward or backward one month, or you can select the desired month or year from the drop-down box.