Date of manufacture

[Phildo]

I have read the notes on how to tell when the V8 block was made but the posts don't seem to talk about recent codes

I have a block with 506 on either side of the V and in the valley I can see 12555506

Does this mean it was manufactured 2012 5 May and it's a 506 or does the code mean something else ?

Any help appreciated

Phil
Melbourne Australia