ARRL Field Day, June 23 to June 24 http://www.arrl.org/field-day
For information about current operating events, go to these websites for details:
Announced DX Operations by NG3K — http://www.ng3k.com/misc/adxo.html
WA7BNM Contest Calendar — http://www.contestcalendar.com/
For information about state QSO parties, go to this website for details:
State & Province QSO Party Calendar by N5NA — http://qsoparty.eqth.net/
Ham Radio Contest Calendar from DL2NBY
Select Agenda, Month or Week. Scroll to view and click on items of interest.