Ailun it right, I use it all the time. It has a neat feature called,
Java Charts in which you can choose just about any setting out there and have your stock charts show it.
first, go here
http://bigcharts.marketwatch.com/
Type in your ticker sybol of the stock and on the far left, a red key says
"Java Charts". (it may take a little time to load.)
THen, it should have little orange triangles with an "E" in them stating the "earnings." If NOT, scroll down until you see
upper indicators on the left. The last drop down box that says,
Events, click it and then click
Earnings.
Hope that helps!
Take care.