My last SSI Installment?

Just wondering, i get my last ssi installment. My first two were 6 months apart and arrived around the 1st or 2nd of the month. Now my last installment should be here this May 2011, and seeing that its everything they owe me, a good chunk of cash and its now 6 months. Will i get it tomorrow ,May 2nd, i know i wouldnt get it today May 1st cause its a sunday. So you think it will be on time and i get it tomorrow, or being cause its a bigger amount, they will make me wait! Thanks