You can add an appointment with a client directly to the calendar. To do so select the date and time, choose session duration and add a note to yourself (optional). Please note that if you add a session with a client directly in the calendar this will not send a session invite to them. Find out how to send a client a session invite here: https://complicated.life/en/support/faq/for-therapists/calendar/how-do-I-book-a-session-with-a-client