You can change the closing date at any stage. After this date, your page will remain visible but it won’t be possible to donate to your fundraiser.
To change the closing date of your fundraising page, firstly login to your iDonate account at: https://www.idonate.ie/userlogin.html using your email/password.
From your account dashboard you can easily select a closing date by selecting the calendar icon beside "Donations Available Until" (Shown above)