I'm sure there are other threads on this, but if someone could clearly explain the multiple calendars on my iPhone, what they are, and whether to delete any, I would really appreciate it. It's quite confusing to me. Some of these events show up in my Mac's Calendar program, although I just want them to all show up in MS Outlook and for Apple's Calendar to just go away. First off, I use MS Exchange for email and corporate calendar management. So my iPhone gets Exchange invites and displays Exchange calendar entries. The calendars listed on my phone are: [My Company Name] Calendar <-- I assume this is my Exchange calendar [iCloud] All iCloud Home Calendar Work Family <-- Shared with my kids WorkProject <-- A calendar of events of a work-related organization [Other] US Holidays Birthdays Events Found in Mail Much thanks in advance for any assistance.