When you clone or duplicate an existing calendar, the notifications you create are wiped. This is a hassle when you're creating different calendar appointment lengths (e.g., creating a 10 minute meeting vs the 15 minute meeting you had previously). Seems like an easy fix - if I duplicate a calendar, I personally can't think of many use cases where I wouldn't want the notification to copy over. I can then go in and make any tweaks if needed. It's frustrating to create a new calendar, and then need to manually copy and paste the notification emails, and reformat them for each new cal created.