If you had any conversations with the imprisoned villain Calendar Man in last year’s action-adventure hit Batman: Arkham City, you know that he hints at a few special dates…one of them being today, April 1.

If you visit him today in the basement of the Solomon Wayne Courthouse (in the northwest corner of the city), he’ll tell you this little story:

Well, well, well, Batman, you listened well. You appear to understand the importance of dates, don’t you? Let me tell you about this day, this day of fools. I remember clearly that I watched her for days, waiting for the perfect moment. It was cold that March; it felt like spring would never come. They drank coffee and she confessed her life lacked surprises. For six more days I watched. April 1st, 5:22 a.m., I finished cutting through the brake lines of her car. From the camera I placed on her dash, I saw her panic. My only regret? She couldn’t hear me yell, ‘Surprise!’

After this one-way conversation, Calendar Man has this cryptic message for you: “Mother’s Day, time to pay. Remember to give your mother a call, Batman. Then come back and see me.”

Mother’s Day this year is Sunday, May 13, by the way. Maybe a good present for mom would be a copy of Arkham City. I’m sure she’d want to hear what this psycho has to say to her.

If you don’t mind spoilers, Calendar Man’s Wikia page has all of the madman’s quotes for a year’s worth of holidays.