Is it possible to have identical campaigns except for one thing, and whenever changes are made to one campaign, the same changes are automatically made to others?

I want to have identical campaigns running for different time zones, but for the campaigns only to run between particular hours of the day in each time zone.

If I have a campaign for each time zone, when I make changes to one campaign, such as adding ad groups, or adding keywords, or changing bid amounts, etc, I want those changes to occur to the other campaigns also.

Is this possible?

Thanks,