There is big chance that the new Operation can still come today, here is why.

I just went through the subreddit and had a look at the update threads for every single operation (Thanks u/wickedplayer494). Here are the times of day/day of the week.

Operation Payback: Friday April 26, 00:02 UTC

Operation Bravo: Friday Sep 20, 01:42 UTC

Operation Phoenix: Friday Feb 21, 04:31 UTC

Operation Breakout: Wednesday Jul 22, 00:38 UTC

Operation Vanguard: Wednesday Nov 12, 05:05 UTC

Operation Bloodhound: Wednesday May 22, 00:23 UTC

Right now as of sending this post it is 11:57 UTC. Who knows, maybe something could still happen soon? Don't give up hope!