Impressive ring-shaped UFO around the sun

On April 3, 2017, a man and his woman living in Montreal (Quebec, Canada) were watching TV when they have noticed a black ring-shaped UFO around the sun. What is it?

Witness report:

I was watching the news reports with my girlfriend and there was a container ship that they were talking about and right above on the right you can see the sun and it had a black ring around the sun. And they did not talk about the ring around the sun and that made me really wonder and made me really surprised also because it's quite obvious like a sore thumb.