I take a different approach to finding recipes that have socio-religious(**) significance. Whenever I read a recipe book or collection and one or more of the recipes is said to have religious significant, such as Ma'amoul of which according to chef NIgel Slater many have no doubt been eaten by Muslims in Jordan at the end of Ramadan or eaten a few weeks ago by Christians in Jordan in celebration of Easter, I update a spreadsheet with the banal file name of "Religious Bakes".
The spreadsheet has tabs for each month then rows for each day of the month with possible (Christian saints names included) and columns for countries. Each cell then contains the names of the recipes (and a comment reminding me of which book I found the details in; I should probably now add a link to those books here). As I learn more about other faiths there are additional tabs for Jewish, Muslim, Pagan, Chinese, etc the tables in those tabs detailing specific festivals. The Chinese tab for example has an entry for Mooncake (for Chinese New Year) and the Japanese one has Strawberry Cake for Christmas.
Also has tabs for movable feasts with Lent and Advent being two I concentrate upon. Saints Days are somewhat problematic as different traditions may celebrate the saint on different days; Roman Catholic and Protestant tables of saints have variatiance. Indeed the Church of England has provision in its Book of Common Prayer and Common Worship for saints having alternate days when they would otherwise clash with a major movable feast or would fall on a Sunday and from my flaky memory there are differences between the BCP and CW listings. I know little about the various branches of the Orthodox Church but from experience of textual analysis of the Bible they have different view on authoritative/canonical/apochryphal books making me think that they would have different opinions on when/whether to celebrate specifc saints.
My thanks to the OP for listing some useful recipe books with collections of (Christian) recipes. I can feel a major Amazon delivery drop coming on sometime soon.
** Could also be socio-cultural such as Sweden's Cinnamon Bun Day or the covnentions of celebrations for ad hoc events like weddings, baptisms, christenings, briss, confirmation, Bar Mitzvah, Bart Mitzvah, Harvest. Calling it socio-religious/socio-cultural allows for things like National Picnic Day, National Spaghetti Day, etc too. Although there are national differences on when such events ought to take place for example the US has just had that National Picnic Day but here in the UK we have National Picnic Week in the middle of June.