On average, there is a zero to six month waiting period after the initial divorce petition is filed and served on the other spouse before a divorce becomes final. A judge may make a final ruling, or judgment, on the divorce prior to that date. This order will be effective immediately. However, the marriage is not finally dissolved, and the spouses may not re-marry, until after the waiting period.
During the period between the judge's order and the expiration of the waiting period, any action taken by either spouse is a separate act. In short, these decisions will no longer effect community property.
Of course, if a divorce cannot be resolved agreeably and requires litigation or a trial, it could take longer than six months to finalize.