When I'm doing memory games from My Passages, and I've been on it for a bit, I often go back to the main screen to see if I've yet hit the threshold to check off the day in My Streaks. It would be nice if, on the My Passages screen, there was a star or something to note completion of the day's streak.
There definitely shouldn't be an announcement or any type of dialog that you'd have to dismiss, as that would encourage people to stop working. But a visible note on the passages list that you could see at a glance would be helpful.