Hi Amy,
I am happy to help!

How to update or delete a calendar reminder?

Log on to your Grokker account via https://grokker.com
Navigate to your profile and select the Calendar tab.
Select the scheduled video you would like to update.
Choose the new time and date and select "Save" or select "Cancel this Reminder" to delete it.
Note: You will receive an email reminder or iOS app reminder 10 minutes before each scheduled video. Click the reminder and it will take you straight to the video page.

For more information (pictures) please follow this link: https://grokker.com/faq#editreminder

Hope this helps! If you need further assistance of any kind the best and quickest way to hear from us is via email at support@grokker.com

Sincerely,
Loren