Editing for previous years

When my customer goes to edit one of her calendars, she sometimes needs to go back a few weeks to change some details. This means she can sometimes go back to the following year.

If she clicks into one of her booking calendars, in the editor she can click on the back arrow in the mini calendar at the top for example and go back to December 2018 then add details to the right hand side day by day but she has to do each one manually. She can’t click on the Start Date and End Date and go back further than 2019 to change the Status for a group of days and apply changes. Is is possible to make this editing section go back a year ?