Originally Posted by
chidi
FWIW:
I have this same problem, in the Apple universe. On my laptop, using Safari and iCalendar, I get an error message from Hilton '400 Bad Request'.
I agree, it's very annoying to have to manually enter your reservation info into one's calendar.
At one time, this feature worked and reservation info would create a calendar event.
The easiest option is to Send the reservation to Calendar in the Hilton app on the iPhone. Use the up arrow when viewing the reservation in Stays. You don't need to book on your iPhone.