Select teh section "hospitality" at the top of the page on the right, next to your profile. Now on the top of the page, in the middle you can see 5 sections. Select the third one, the "calendar".
You can click on your entry on the left to be able to see all the months available.
You select the dates you want, and from the right, once they are selected you can change the price, the availabillity etc. Good luck!