Immovable feasts

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(Eccl.) feasts which occur on a certain day of the year and do not depend on the date of Easter; as, Christmas, the Epiphany, etc.

See also: Immovable

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Some of these are pretty well immovable feasts: the Budget, for instance, is almost always in March, the local elections in May, the party conferences in the autumn and the Queen's Speech in November.
BRITE, TED, Davos, sxsw, Ignite: the immovable feasts of the great religio-business calendar, where dapper gents with bubbles and sparkles on their business cards exchange triumphalist ideas by day and then charge $14,000 in drinks by night.
Lunch and tea are immovable feasts, but that still doesn't excuse the acceptance of offers of bad light by an England side which were all too eager to head for the dressing room at the first opportunity.