Am I entitled to half of my ex-husband's retirement up through the divorce or does it continue after as well?

In Arizona you would receive one half of the community interest in the retirement account at the time the dissolution decree is entered. The community interest would be the portion of the retirement that was earned from the time you were married until the petition for dissolution was served or an acceptance of service was signed. You should consult with an experienced family law attorney to discuss these issues.

Community property is accrued during the marriage, so from the date of marriage to the date of service of the petition for dissolution. I would suggest consulting an attorney if you have more questions about your interest in community property.

It is calculated as of the date of divorce. Any accrual after that is his alone.

The court can do a number of things when it comes to awarding rights in the other spouses retirement and pension benefits, so I cannot give you a simple or exhaustive list of what your rights are because the judge has many options to choose from in making these kinds of awards. Generally, however, you can expect to be awarded half of the pension and other kinds of retirement benefits that were acquired and/or accrued by your spouse during the marriage. Usually, courts in Utah will not award you a continuing interest in or portion of your ex-spouse's pension or retirement benefits that accrue after the marriage is dissolved.

My understanding is that you might be entitled of half of the deposits into his retirement account during the marriage.

Benefits accrued after the divorce are separate property and cannot be divided by the court; however, the parties can agree to do so. I suggest you hire a lawyer.