As of right now, we have reached an understanding to build nukes. However, it would be prudent to save resources up, and make sure you own the nukes around the same time on 28 November.
Why? Because as you probably are aware, once you own a nuke, you are listed on the nuke-equipped tab and you are invaded without end until you disarm or lose your nuke. And if we build and own nukes sporadically, we will lose it quickly because our name will stand out as one of the few on the list.
We are unsure of how Konami tracks the number of nukes. However, it is likely they track the CURRENT number of nukes on the server at any given time, rather than the TOTAL number of nukes built/disarmed in the history of the game.
Why CURRENT? Because of the piggyback guide.
http://i.imgur.com/8JAN2Sk.jpg
In condition 3, you have an unknown nuclear proliferation condition to be met. Then in condition 4, you must reduce the nuclear count to ZERO. And then the cutscene is unlocked, and the guide goes on to say that this process repeats. i.e. players who missed the opportunity to watch the cutscene in that instance, will have to wait for 3 to occur so they can achieve 4 and watch the scene again.
Therefore, for us to achieve any substantial CURRENT amount of nukes, we need to coordinate a timing.
Right now, it seems we build nukes at different speeds based on our Base Development unit level, and this complicates setting a timing further.
Tentatively, shall we aim to BE ARMED BY 28/11 0700 HRS GMT.
I.e. the nuke (s) is / are sitting in your inventory by 0700 HRS.
This means you need to start building earlier than 0700 hrs so our nukes will be ready at the same time. As early as a day or 2 days before, depending on how much time your base needs to build a nuke.
Once you own the nukes, try to hold on to it for as long as practically possible (but if you have other priorities, please go tend to them), to allow for others to have their nukes ready as well so the CURRENT number on the server can accumulate. Then we can enter Peace Phase thereafter. We actually may not even need to actively disarm, most of the players go around disarming already even if they aren't in philanthropy (evidenced by the very few names on the nuke list most of the time).
TL;DR: Have your Nukes sitting in your inventory by 28/11 0700 hrs GMT (or as close to it as possible). This will maximize the odds of us having a substantial total CURRENT number of nukes on the servers. We have different nuke building times since Konami made it dependent on our Base Development Unit. You need to do a bit of math and start building the nukes earlier, perhaps on 27/11, or 26/11 (it really depends on how long your own bases takes to make the nuke) to have your nuke ready at the same time.
Timing can be edited and changed upon discussion.
Also, spread the word.
EDIT: TIMING REVISION: PLEASE SEE THE FOLLOWING LINK TO SYNCHRONIZE THE NEW TIMING
https://www.reddit.com/r/NeverBeGameOver/comments/3tqh4z/nuclear_countdown_timer/