Sabrina, now that I think about it, it was. Let me double check the database though, because my first reaction was that it was not nocturnal, but I remember going back to purchase more, and there were blooms opening late in the evening. That was, I think, my first experience with nocturnal daylilies.
Edited to add:
Daylily (Hemerocallis 'Pardon Me')
Looks like it definitely is nocturnal.
