†e. the week of the four Fridays: an imaginary date that will never arrive. Obsolete. rare.
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the world > time > frequency > infrequency > [noun] > time or date which never comes
Latter Lammas1559
nevermas?1562
the week of the four Fridays1766
Tib's Eve1785
nevermore1951
1766 H. BrookeFool of Quality I. Ded. p. xxvi At the time that the hogs shall..feed along with the herrings;..or on the week of the four Fridays, so long looked for by astrologians.