I’m 61. I had hysterectomy 30 years ago and am suddenly having light spotting. I’m concerned about what could be causing this. Any ideas?

What kind of spotting? If you have had your uterus, cervix, ovaries and tubes removed any discharge is very likely vaginal atrophy, especially if you have been feeling very dry. I agree that you should call your doctor but not panic.

You could do a Google Search

This is quite a different topic than most posts about caring for an elderly loved one.
Call your doc first thing Monday AM.

Please call your gynecologists' office in the morning and make an appointment to be seen ASAP, as 99% of us on this forum are not qualified to even make a guess. Your health is too important to leave it up to total strangers to try and guess what's going on.
I wish you the very best.

Contact your PCP on Monday and schedule an appointment. If you develop other symptoms including more bleeding and pain get to an urgent care or er