They expire November 9th. This may be the apex of the slippery slope down to pay-2-win town, but for the time being, I'm fine with it! Seriously, most of us have far too many glimmer consumables, I have at least 100 black wax idols. All festival consumables expire, and it is not going to affect gameplay. Look at me! I'm so OP with my salty engram and glimmer telemetries! Watch the game break under my wrath because I paid for a bunch of useless consumables!