To communicate to your manager a day off request, head over to your request main page by clicking on the upright finger icon

It's on that page that you'll be notified of the status of your requests. They will either be Pending, Approved or Refused.

Click on the "New" button, a pop up will appear allowing you to specify the date and time of your request. Finish the request off by adding the reason and hit "Add". That's it! You'll get notified your request's status change.