For years Apple has made available their own and third-party calendar subscriptions on their iCal Calendars site. Now Apple has appeared to have taken their iCalendar subscription servers offline. The servers host iCalendar files which anyone with an app that supports the iCalendar (ICS) standard can subscribe to. iCalendar files can be used in popular apps like Calendar on iOS and OS X and Google Calendars. Subscribable calendars are an easy way for people to add a mass amount of data -- like holidays or sporting team events -- to their planners. Once subscribed, the calendars automatically update when any cha
