You can always adjust the date and time of an online invitation through the event details in the dashboard. This may be necessary if the schedule changes or if the event needs to be rescheduled.
The change becomes visible immediately on the invitation webpage. Guests who open the link will automatically see the most recent information.

Where to change the date and time
Open the menu (⁝) next to your invitation in the dashboard and choose Edit details. There you can update the date and the start and end time. After saving, the new time appears immediately on the invitation page.
What guests will notice
Guests who open the invitation again will automatically see the updated date and time. Because the invitation is a webpage, it always shows the latest information.
If guests have already added the event to their calendar, the old time will still appear there. In that case it is best to send guests a short message with the link to the invitation.
Guests can then click the Add to calendar button again to add the updated event to their calendar.
The calendar feature uses a so-called .ics file. This is a standard format supported by almost all calendar apps. The file contains the date, time, location and link to the event so calendars can add it automatically.