Posting Date in Production Order ?

Hi,

I created a PO in CO01 on 05.06.2015. But not released.

I released the PO on 10.06.2015.

Then which is my posting date.

I assume release date as posting date, but want to confirm with experts.

Where can i see this posting date in CO03 screen.

Is BOM explosion date is the PO posting date.

For. e.g.,

In any Zreport (with input posting date FROM & TO), if i want to get this order details means which date should i give as input.

Bare with me if  the question is silly.

Dinesh.