How do I cancel a yahoo calendar subscription?

I'm sorry to hear that you're having trouble unsubscribing from a calendar. It sounds like this calendar layer may have been associated with a Yahoo Group that you were a member of. For Groups calendars you will need to unsubscribe from the group itself to remove the calendar from your list. You won't see the option to 'unsubscribe' from within Yahoo Calendar like you will for other calendars.

I looked into your account further and in this particular case it doesn't appear that you are currently a member of any Yahoo Groups. This calendar layer should not continue to be listed among your subscriptions. I have escalated this issue to our engineering team for further review. We appreciate your patience as they investigate and work toward getting your account unsubscribed from this calendar.

I'm having the same problem. Ever since Yahoo changed the format of the homepage and mail, everything seems more cumbersome. What I noticed is that the Jewish holiday dates are all messed up in the calendar, so I thought if I unsubscribed and then re-subscribed, it might straighten out. But I can't un-subscribe, and refreshing the calendar doesn't help. I wish Yahoo would not make arbitrary changes without warning. (Or even with warnings!) It's annoying.