If you are a manager or a reportee you can schedule a one-to-one for a future date.
The earliest you can start a scheduled one-to-one session, is 10 minutes prior the start date and time.
To schedule a one-to one:
On the One-to-Ones screen, click Schedule a one-to-one.
The Schedule a one-to-one screen appears.
Select a date and time for the one-to-one.
In the Where will it take place? field, enter a location.
In the Who is it with? section, select a user.
The one-to-one is created and added to the Upcoming one-to-ones list. 
To download a scheduled one-to-one and add it to your calendar, click the calendar icon. 