** Feast of the Transfiguration of Christ

** Feast day of the Assumption of Mary, one of the Catholic holy days of obligation.

** Feast of the Transfiguration ( Julian calendar ), and its related observances:

** Leave-Taking of the Feast of the Dormition of the Theotokos ( Eastern Catholic Churches )

** Feast of the Holy Innocents or Childermas.

** Feast of the Seven Fishes ( Italy )

** Earliest day on which Feast of the Holy Family can fall, celebrated on Sunday after Christmas or 30 if Christmas falls on a Sunday.

** Feast of the Chair of Saint Peter ( Roman Catholic Church )

** Feast of Saints Peter and Paul ( Western Christianity ), and its related observances:

** Feast of the Most Precious Blood

** Feast of the Visitation at Mariánska hora.

** Earliest day on which Feast of the Immaculate Heart of Mary can fall, while July 3 is the latest ; celebrated 20 days after Pentecost.

** Helena of Constantinople, also known as " Feast of the Holy Great Sovereigns Constantine and Helen, Equal-to-the-Apostles.

** Feast of the Holy Sovereigns ( Episcopal Diocese of Hawaii )

** Feast of the Guardian Angels

** December 21 ( Feast of St Thomas the Apostle ) – They discover Isla Santo Tomé, probably Socorro Island.

** Feast of Saint Nicholas ( People give each other gifts, often supposedly receiving them from Saint Nicholas.

** Fifteenth Day of the Seventh Moon ; this holiday was called All Saints ' Feast, developing from the legend of the bodhisattva savior Mulian who had discovered his mother paying for her sinful ways while in purgatory filled with hungry ghosts.

** André Previn ( conductor ), Arthur Oldham ( choirmaster ) & the London Symphony Orchestra & Chorus for Walton: Belshazzar's Feast

** Alexander's Feast ; or, The Power of Musique

** Andrew Litton ( conductor ), Neville Creed, David Hill ( chorus masters ) & the Bournemouth Symphony Orchestra & Chorus for Walton: Belshazzar's Feast

** Vampirella / Witchblade: The Feast one-shot ( 2005 ) ( Harris Comics / Top Cow Productions, 2005 )

** Robert Shaw ( conductor ) & the Atlanta Symphony Orchestra & Chorus for Walton: Belshazzar's Feast / Bernstein: Chichester Psalms ; Missa Brevis

** Andrew Litton ( conductor ), Neville Creed, David Hill ( chorus masters ) & the Bournemouth Symphony Orchestra & Chorus for Walton: Belshazzar's Feast

** Robert Shaw ( conductor ) & the Atlanta Symphony Orchestra & Chorus for Walton: Belshazzar's Feast / Bernstein: Chichester Psalms ; Missa Brevis

** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** If the set A is infinite, then there exists an injection from the natural numbers N to A ( see Dedekind infinite ).

** Every infinite game in which is a Borel subset of Baire space is determined.

** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.

** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.

** The Nielsen – Schreier theorem, that every subgroup of a free group is free.