Some applications require rain. 

Rain in June, hmmh, not so easy if you want it at a specific place. 

2 dates were proposed , 27th June 2012 and 30th June 2012.  Well our client got his rain after all.......date selection is indeed a powerful tool.  But 27th June 2012 is a superior date compared to 30th June 2012 in this case.