Yeah, I was using their pattern in the past, always the day before on the deadline. I just double checked and they did do it the same day once. Also they gave the warrants tendered with each extension. For reference:

offer Nov 24, 2017 with deadline Dec 22, 2017
extension Dec 21, 2017 with deadline Jan 26, 2018
extension Jan 25, 2018 with deadline Feb 28, 2018
extension Feb 28, 2018 with deadline Mar 23, 2018
Mar 26, 2018 8k giving the final number of warrants