Parents' B1/B2 visa interview was rescheduled after my PhD graduation date. Not sure what to do?

Hi everyone,

I have a question about my parents' B1/B2 visa application.

I'm graduating with my PhD in August this year. When my parents completed their DS-160, they listed the purpose of travel as attending my commencement ceremony and visiting me and my family in the US.

Their visa interview was originally scheduled before my graduation, but the embassy later rescheduled it to December, which is several months after the commencement ceremony.

The thing is, while it would have been nice for them to attend my graduation, my main goal is simply for them to be able to visit me, my spouse, and my children in the US from time to time. Their attendance at the ceremony itself is not critical.

My concern is whether the fact that the graduation will already be over by the time of the visa interview could create any issues, since that was one of the reasons mentioned in the DS-160.

Has anyone experienced something similar? At the interview, should they simply explain that the graduation has passed but they still want to visit their child and grandchildren? Or is there something else we should be doing?

I'd appreciate any advice from people who have gone through the B1/B2 process.

Thanks.