My original article from 2009 used a simple example: adding the World Cup schedule to your calendar in one step. You did not have to type every match separately. SchedJoules was then a calendar portal that helped people find public calendars.
A calendar that can update
The value of a shared calendar lies in maintenance. A match may move, school holidays vary by region and an event may receive a final start time later. If you subscribe to a reliable calendar, changes can arrive without fixing every entry yourself. A one-time import is different: it copies events but does not necessarily keep them updated.
That is the first distinction to check. Look in your calendar app to see whether you are subscribing to a calendar or importing a file. Then check who maintains the source and when its events were last updated. An attractive calendar is not useful if its data is wrong. For public holidays or school breaks, an official source may be preferable.
From portal to data provider
SchedJoules now presents itself mainly as a provider of public calendar data and an API for calendar apps. The old description of free calendars for Outlook, iCal and Hotmail should therefore not be followed as a current product guide. The underlying idea remains useful: shared data can remove repetitive manual work.
Keep the calendar manageable. Add only sources you actually use, and check that sports, television and event alerts do not bury your important appointments. A digital diary helps only when you can still find what matters to you.