When the page loads the current month's data is load. To change months just select the month from the drop-down list ("Select a Month:") and the new month's data will be loaded

Select a date on the Calendar and the Ride Listing, below the Calendar, will update and show only the rides for that date. If there are multiple rides on the choosen date then the first ride is shown in the Ride Detail area.

To select another ride on that date just click on the Title of the Ride (in the Ride Listing area) and the Ride Detail area will update.