Pokémon TCG Pocket is giving away 24 pack hourglasses (that translates to 2 packs) and 500 Trade Tokens (which will be replaced by Shinedust eventually, but stocking up won't hurt). The rewards are available until May 27th at 7:59 AM. No timezone was provided, but, assuming it's Japanese time, it'll go out when the countdown below reaches 0 (and it actually finishes on the 26th for those in the US).
To get the goodies above, you'll need to first go to the official Pokémon TCG Pocket webpage. There, you'll need to insert your Support ID (which you can find in the game from the settings menu, and it should be visible there) and introducing the code S5N4NDM00N. Once that's done, claim them in-game from the gift tab (top-right corner on the main page, looks like a gift box).

Quote From Pokémon TCG Pocket Let's celebrate Golden Week globally!We've got some goodies to give out to everyone! Enjoy the gifts.
What do you think of Pokémon TCG Pocket? Are you enjoying the game, or are there things you'd see it do differently? Let us know in the comments below!
Comments
Thanks for the news!
For some reason, there seems to be a bug with the button, it takes me to epic instead, here you can see both links appear in my browser
Oof, big blunder on my part. Fixed now, sorry it took so long, didn't get a chance to get to the site between when you sent the comment and now.