When my father was diagnosed with terminal cancer just a few weeks ago, I did exactly what your friend did. I thanked God for each additional day I was able to spend with my him because I knew each day could be his last. And on his last day, I thanked God one more time, because although it was a very sad day, it was very special day, too.
That was such a beautiful post Jenny, and a beautiful reminder that none of us is guaranteed a tomorrow, so we should live each day to fullest, and cherish our loved ones every day.