Sign from my mother?

Seven years ago, the day that my mother died, the grass of my garden was covered with a carpet of white feathers.
That was so special.
Since that day whenever I find a feather, even on very remarkable places e.g. inside a museum cellar, I see this as a sign from my mother.
Can you imagine?
This week on the same day in September she died, I saw this little feather on the tomato that I was about to eat...
How special is that?