I DID NOT check "include Yizkor dates" but the generated calendar included them anyway. If you're going to impose them on us, don't give us a fake opt-out.

Thanks for using the Hebcal Yahrzeit and Anniversary feature. We are sorry to hear that there is a problem with your calendar involving Yizkor events.

Can you send us the URL of your calendar subscription so we can investigate the problem?

Or if you don't have that, could you forward us one of the email confirmation or verification messages? You can paste it here or your can send it to mradwin@hebcal.com

Thanks!