If you’ve already confirmed a sitter but you’re both happy to change the dates then you’ll need to unconfirm the sitter first.

Just select ‘Unconfirm’ in your messages with the sitter. There will be an option to unconfirm the sitter above the conversation thread.

Once you've unconfirmed the sitter, you will need to go to your dashboard and click on the 'Add/Edit dates' option. From there, select the date range you wish to change. Make the changes you need to and then select ‘Save & confirm dates’. This will then save the dates on your listing for your sitter to then accept the date changes. 

Once the sitter has accepted the date changes (they can do that in their messages with you in their inbox) you can reconfirm them as your sitter. To reconfirm them as your sitter, all you need to do is go back to your messages with them and hit the 'Confirm' button.