Is it normal to have regular periods at 54?

I will be 54 next week and I also have regular periods. In fact I'm having one right now! I don't know the answer to this but at least you aren't alone. All my friends around my age no longer have periods. I did meet an American lady on holiday and she told me that she had periods until she was 55. It can be a blessing in disguise as I guess we must still be producing heart protecting hormones.
Regards, Kathy.