Yes, and it is really easy for them!
To extend their page expiry date and continue fundraising for your charity, they will just need to log into their account, visit the page they want to update and and click "Edit this Supporter Page"
Once in the editing functions, they will simply need to choose their new date from the calendar.
If the page has expired, your supporters can choose to reopen the page by completing these steps as well.
They can also contact everydayhero if they need any help.