A couple of things:
According to the wiki (and we know how that goes) Melito of Sardis is a saint. As proof a link to an Orthodox website referring to “St Melito”. If anyone knows anything about this, let me know. True or not the Wiki reports that Melito’s feast day is 1 April. Coincidence being all things…
Sunset on 1 April 2007 is the beginning of 14 Nisan. Sunset on 2 April is the beginning of 15 Nisan.
Some authorities indicate that the ancient Quartodeciman communities fasted until 3PM on the 14th and feasted at Sundown… this would correspond near exactly to the Jewish Fast of the Firstborn on 14 Nisan followed by the Passover meal. Other maintain that the Qs feasted on the night of the 14th.
Without any first-hand knowledge on the topic, it seems that Praxis Asheville follows this second style (does that make them Pentadecimans?) I was also interested to learn that “Sabbatarian Church of God” groups, Messianic Jews and Jehovah’s Witnesses also use Quartodeciman systems.
Finally – the start of this ramble – Melito (Saint or Not) has left us a brilliant work in his Peri Pascha or “On Pascha”. I have a good translation here, published by St Vladamir’s Seminary Press but finally it is also available online. Some consider this to be one entire homily. Others suggest that, in fact, these are fragments of a Christian Haggada or service book for that community’s seder service.