This past Thursday, on which the Orthodox Church celebrated Christ's Ascension, I called a friend to make plans for the weekend. She greeted me with a hearty "happy feast day." I responded "Christ is Risen!"
My friend, who is not a convert (edit: like me), paused for a moment and then responded in Greek, "Alithos Anesti!" before asking whether or not we were allowed to use that greeting now, and I had to stumble through an apology for a bad religious pun (rise/ascend). I didn't broach the subject of St. Seraphim of Sarov's use of the Paschal greeting year round.
Anyhow, check out Fr. Joseph Hunnycutt's post (& podcast!) It's good for what ails me.