The most common reason that you will not see an event in your Events or Flexible Opportunities list under the Event Calendars because the event  is further than 50 miles from your zip code. 

You should be able to find any event, however, by searching for it. To do this:

1.Click on the Search for Event Set the Date Range to cover the day you want to volunteer and enter a city and or state and click Search. 
2. Once you have found the event, click on the "Sign Up" button to the right of the event