# Calendaring introduction Anyone can read calendars shared publicly at [[!template id=realm]]. Your personal [[account]] grants read-only access to closed-group shared calendars. Custom group accounts provide write access to (closed-group or public) shared calendars. ## Clients Recommended calendaring client depends on the operating system you use: * Mac, iPhone and iPad: Apple Calendar * Windows and Linux: [Mozilla Lightning](https://www.mozilla.org/en-US/projects/calendar/) * Android: [DavDroid](https://f-droid.org/app/at.bitfire.davdroid) ## Security Before you setup any password-protected calendars, make sure to install the [CACert.org security certificate](http://wiki.cacert.org/FAQ/BrowserClients). ## Read-only access When you only need to read a calendar, then the best (most efficient) is to subscribe to an "iCal" calender: 1. Go to web page http://[[!template id=eventhost]]/ 2. Copy address of relevant calendar. 3. Open calendaring client, and add new account profile. 4. Request creation of a new "ical" profile 5. Paste the calendar address as server address. Closed-group calendars also require username and password, and require a secure connection (TLS or SSL, or "https://" address). ## Read-write access To both read a calendar and help maintain its content, you need to setup a "CalDAV" profile: 1. Open calendaring client, and add new account profile of type "CalDAV" (a.k.a. "on the network"). 2. Server address: **[[!template id=eventhost]]:8443** 3. Username and password: Either personal or calendar-group account credentials. If above fails, or if you want to specifically pick a single calender, use this alternative approach: 1. Go to web page **https://[[!template id=eventhost]]:8443/calendars/users/USERNAME/** (replace USERNAME with either personal or calendar-group account name) 2. Copy address for relevant calendar (a.k.a. "Collection"). 3. Open calendaring client, and add new account profile of type "CalDAV" (a.k.a. "on the network"). 5. Server address: Paste the calendar selected previously.