Gonna bump this once. @dthorne04 @harleQuinn ?

My best guess is a day. I don't think I'll be able to find clarification before the timer clicks down on the coin earning portion of the event, either. 

So, we'll find out when we get there. :)

24 hours i thought,  ample time to sell top off packs :)

Was vaguely hoping it'd last long enough for champ chase this weekend :)

You get exactly zero seconds..

i

I'm 99% sure what that means is, when the event closes. After the time ends, there's a grace period to redeem them before it closes.

This is just your way to brag you got Tatura, admit it. :)

If you want to hold off collecting Tatura, you do so at your own risk.

I read it as when the event ends it will convert all coins to silver straight away other wise it would say you have 24 hours.

If you look in the other events (fusion warmup and artifact) it states you have 24 hours to collect rewards.

It doesn't say that in the hero event.

I personally wouldn't wait, but the last few Hero's Path events - at the very least - have had a period of time after the coin earning portion of the event ended where you could still us said coins.