Never
.There are numerous locutions to express this idea; as—
At the coming of the Coqueligrues (Rabelais Pantagruel).
At the Latter Lammas. (See Lammas.)
On the Greek Calends (q.v.).
In the reign of Queen Dick. (See Dick.)
On St. Tib’s Eve. (See TibʹS Eve.)
(In) la semaine des trois jeudis.
When two Fridays come together
When three Sundays come together
When Dover and Calais meet. (See Dover.)
When Dudman and Ramehead meet. (See Dudman.)
When the world grows honest.