It's not likely that you will need your legal date often (if ever). But if a legal official asks when you got married, you need to give the date on the license.
Marriage License Requirements Driver's license. State issued I.D. card. Passport (must be in English) Military service or military dependent I.D. card. Alien registration card (formerly known as “Green” card) I.D. card issued by the U.S. Government.
You may NOT amend the marriage license after it has been issued to add or change the name you wish to be known as after you are married. The name you indicate on the marriage license application will be your name on the marriage license/certificate and cannot be changed by the County Clerk.
Note: Confidential marriage records must be amended through the county clerk in the county where the license was issued. Contact information for county clerks may be found in the county registrars and records directory page.
You wouldn't be able to just backdate a marriage license - b/c it wasn't legally issued until it was issued.
We then perform the ceremony as a commitment ceremony and for the most part none of their guests know the difference. A couple of them need to set an appointment with us to sign the actual document. Unfortunately that document cannot be backdated. It has to be signed on the date is presented.
A marriage license can only be dated with the date on which it is issued.
After your ceremony, your officiant is legally required to file your license within 10 days. Generally, couples are permitted to submit requests for certified copies beginning 7 days after the wedding date.
In California, a factual mistake included on the face of the marriage license can be corrected by filing an Affidavit to Amend a Marriage Record with the County Clerk's office in the County that issued the marriage license.
For many people, a wedding often means a name change is in order. If you are legally changing your name, you need to apply for a replacement Social Security card reflecting your new name. If you're working, also tell your employer.