question about zakum and time server

I know that you can kill zakum 2 times per day
but how the "times per day" works?

I have to count 24h since the 2nd time I killed him ?
or the boss resets at 00hs from server time?

 

Boss counter resets at 12AM server time.

 

thanks

 

So does it mean if i fight one at 11pm server time, it reset 1 hour later?

 

Yes. Essentially, you could do 4 runs simultaneously, 11pm start, ends at 1130, start 2nd round, ends at 12am, start 3rd (technically 1st round, since server has reset the counter), etc.

 

What happens if your 2nd round ends after 12AM? Does it count as the 1st round of the Next day being used?