I don't think it's a matter of "holiness", and it is rather personal. I think it seems a little more appropriate and socially acceptable to wait a little while.
I can tell you something that does get on my last nerve, though...people who date right after a divorce! Or, worse yet, before the divorce is even finalized.
Come on. The union should've meant more. If you're not heartbroken by the loss or departure of a spouse, you should at least
pretend that you are....
On our worst day ever, I would still be crushed at losing Jeff, whether by death or distance. I really don't understand those who are casual about the loss of a relationship. Makes me a little mad.
But I've gotten sidetracked...once a spouse dies, the only person who can ultimately deal with the sadness and loneliness is the widow/widower, and if that means remarrying someone and/or finding a new companion, then more power to them. I don't know how I might react, because I've never been there.
I certainly don't think there's anything unchristian about it (remarrying [quickly] after the
death of a spouse. I think it's more about etiquette, but it's really none of my bizness, and I would just hope for the most happiness possible.