Yes, in post #2. There's also a link in that post, so make sure to check it out.
You can try a lot of ways of setting a reminder, you don't have to follow what I have said exactly... Cortana has been designed to be able to recognize some language patterns such that it can set a reminder by saying "Remind me to reply at Windows Central when I arrive home" or by saying "When I get home, remind me to reply at Windows Central". - the arrangement of words doesn't really matter as long as they are grammatically correct.
For appointments, you can say something like, "Calendar reply to Windows Central posts tonight from 7 PM to 9 PM at home". Depending on how it was said, Cortana may automatically fill in the details of your appointment, such as the appointment name (reply to windows central), time (7 PM to 9 PM) and place (at home). If "she" wasn't able to fill them all in automatically, she would ask you more details in a subsequent page, such as "When do you want to start your appointment?", and you can answer the question by saying the place and "she" would update the details automatically.