Μεσοπεντηκοστή
Sorry, we don't yet know the date of the next celebration of Mid-Pentecost.
The feast of Mid-Pentecost is a moveable feast celebrated on different dates each year. Here are the latest known celebrations:
Fast
fasting day with fish, wine and oil permitted (ichthyos)
The Mid-Pentecost Day is not a fasting day per se, but in 2025 the date of May 14 falls within a fasting period.