Hi LEX Product Team, @Kristen Hartmann Bragaw, @Michael Orr. We are seeing a problem with a lightning experience override on "New" for the calendar. In classic, it works without issue and the correct page appears. In lightning, it does not function. From the case, Salesforce confirmed this as a bug. Does anyone have any idea if this will be updated in a future product release.  @Cheryl Feldman FYI

Case Number: 20707867

CC: @Jarad Caico