It is the Ascension icon. Perhaps I should have been more clear that I wasn't asking for the feast of the icon, but rather based off of the icon what day was it? The fact that it's a trick question was meant to suggest that it wasn't the day of the feast of the Ascension.
Sunday of the Holy Fathers.
Do other churches celebrate major feasts as an octave (minus Pascha which is 40 days)?
Technically, an "afterfeast" is not an "octave", at least not in all cases.
Afterfeasts seem to be uniquely Byzantine and Roman/Western. Syriac practice has them for Pascha, Pentecost (Sunday through Tuesday), and Christmas (through Epiphany). Off the top of my head, though, I can't think of any other feast which has them.