1. Click the calendar you want to subscribe to:
If you subscribe to multiple calendars, only the first will be included in your iCloud account; any others will be on your current device only.
2. When asked for permission to open the calendar, click "Open Calendar."
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3. In the next popup, the calendar URL will automatically be filled in. Click "Subscribe."
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4. In the Info box, choose "Auto-refresh to Every Hour," and click OK.
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