Does game time stack?

I couldn't find the answer in support homepage.

Bought the PS4 started edition which gave me 30 days (and plus 15 for getting to max level I think?), but I want to play the game on PC and the complete edition also gives me 30 days. Will I get 30 days plus the ones I already have or do I wait for my current game time to expire and buy the PC complete edition then?

Thank you.

No reply from square. Seems they do not care if I keep playing this game or not.
Good to know.

I think included game time does stack but only if you are adding a new platform to the game account - like adding a PC platform on to the existing PS4 one.

However if you want an official response from SE then I'm afraid you are not going to get it here. You could try email support or a livechat?

I mean the answer is right in the purchase.
Buying a platforms base game gives you 30 days. Yes it stacks on to any accrued time you already have.

I was only asking because I'm getting 2 "free" game time months and wanted to be sure.

And yes, I contacted SE directly but no response yet.