Map shows future

I was stuck in a traffic jam near the sport park. it might be caused by a junior school's sport meeting.
Student's parents bring their children to the park and the road around the park was jammed.

Since the meeting might be planed since months ago, If information about the event were published on the net, Could I have a chance to expect a jam caused by it?
I mean, if I query time and place to search engines with map, Could they give maps that show locations of the events with accurate time?

Then I tried to search my living city name and the time "October 2010" in Japanese, which was "2010年10月", using google maps.
It showed the list of events and the map having markers pointing the place of the events. These locations had good accurate but some these date time was not expected.
For example, April 2010 ("2010年4月"), July 10th 2010("2010年7月10日") and so on.
And I also tried to search using Bing but the result is not what I expect.

As concerned about Google Maps, There are rooms to improve analyzing date information more accurately.
If search engines with map could understand not only where the events occur but also when they occur, we might get more useful information for our lives.