California celebrity couple announce their impending divorce ten years and one day after wedding, after several months’ separation.

That timing sounds a little too coincidental to write off as such.

There are several possible explanations behind this timing.

One lies in California divorce law, which classifies a marriage of ten years as “long term”. (Not so here in Florida.) A long term marriage typically provides the lesser earning spouse with advantages around alimony and spousal support.

It’s also a common marriage length milestone in prenuptial agreements, often escalating the amount of spousal support and property division.

It’s also possible that that timeframe has significance in external documents that may have a bearing on divorce and life after it, such as a trust or a will.

Read more in this Fortune magazine article: What we can learn about prenups from the Ben Affleck-Jennifer Garner divorce .