Use this link for the 2017 USAA Military Pay Deposit Dates.
USAA has not yet posted its 2015 pay posting calendar, but I have created a schedule that should be exactly right. USAA offers to deposit military pay "one business day" early, which is pretty easy to figure out! You can click on the image to see it larger, and then click on the attachment again to see it even bigger.
Let me know if you have any questions about this.