Visible calendar months
The calendar on the front end of your website can be customised, whether you want to display a minimum amount of months or have all your availability on display for next year is entirely up to you.
Site Settings > Site > Number of Months To Display
Above there is also the option to change the day of the week of which your calendar runs from, by selecting the dropdown from the Week start day field.
Whilst beneath you will also see a Hide Previous Months option. When this is ticked, the front end calendar will only show the current month onwards. With it unticked, the calendar will start from January and run until the amount of months set within the Visible Calendar Months.
If you change any of the values or tick boxes, make sure you scroll to the bottom of the page and click Update Site Settings as displayed below: