Hi Phillipa
Thank you for your request.
On this community, we don’t have any information about our customers’ orders.
The date of your day pass cannot be modified. I advise you to contact us by phone at 0848 44 66 88 (CHF 0.08/min), my colleagues can help you. You can also buy a ticket with the correct date and request a refund with this form
I wish you a good weekend.
Regards
NicolasK