6 The beginning of the fast of forty days is on the fifth of Phamenoth; and when, as I have said, we have first been purified and prepared by those days, we begin the holy week of the great Easter on the tenth of Pharmuthi (Apr. 5), in which, my beloved brethren, we should use more prolonged prayers, and fastings, and watchings, that we may be enabled to anoint our lintels with precious blood, and to escape the destroyer. Let us rest then, on the fifteenth of the month Pharmuthi (Apr. 10), for on the evening of that Saturday we hear the angels' message, 'Why do you seek the living among the dead? He is risen.' Immediately afterwards that great Sunday receives us, I mean on the sixteenth of the same month Pharmuthi (April 11), on which our Lord having risen, gave us peace towards our neighbours. When then we have kept the feast according to His will, let us add from that first day in the holy week, the seven weeks of Pentecost, and as we then receive the grace of the Spirit, let us at all times give thanks to the Lord; through Whom to the Father be glory and dominion, in the Holy Ghost, for ever and ever. Amen.
Salute one another with a holy kiss. The brethren who are with me salute you. I pray, brethren beloved and longed for, that you may have health, and that you may be mindful of us in the Lord.
Here ends the third Festal Letter of holy Athanasius.
Source: Letters (New Advent)