In the best of all worlds, Christians would refrain from work on major feasts and devote themselves to prayer and spiritual works. In times when religious observance was much the norm, the practice was not only allowed but expected and even encouraged; in our modern, secularist society, this is an opportunity that few are given and a luxury that few can afford. No, it is not wrong to work today but, to the extent that one is able to do so, we should seek to publicly or privately observe the solemnity of the feast by prayer, participation at Divine Liturgy, or however else we may.
Many years,
Neil
