Memory lapse

I know it happens to everyone but wowza on this one. I was scheduled for a breakfast meeting through a professional association. I saw my reminder yesterday. I told someone in the office I would be in a little late. And then it was gone from my brain until almost lunchtime, when I thought, don't I have a meeting sometime today and checked my calendar expecting something after lunch. Even if I had checked my calendar this morning, I would have missed it, since I check my calendar at work, not at home. Is this MS or age?