Wikipedia's first sentence called it “unique jewish fast day which usually falls on the day before passover”. Today it says “unique fast day in judaism”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
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The opening as it read in 2005
Fast of the Firstborn (or Ta'anit B'chorot/B'chorim ) is a unique Jewish fast day which usually falls on the day before Passover .1The fast's name commemorates the salvation of the Jewish firstborns during the plague of the firstborn (according to the Book of Exodus , the tenth of ten plagues wrought upon ancient Egypt prior to the Exodus of the Children of Israel ), when, according to Exodus (12:29): "...God struck every firstborn in the Land of Mitzrayyim (ancient Egypt)...." Unlike most Jewish fast days, only firstborns have the custom to fast on the Fast of the Firstborn .2
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 17507312.
The opening as it stood in 2010 1 passage from the previous snapshot no longer appear
Fast of the Firstborn ( , Ta'anit B'khorot or [ תענית בכורים ] Error: {{Lang}}: invalid parameter: |dir= ( help ) , Ta'anit B'khorim ); is a unique fast day in Judaism which usually falls on the day before Passover (i.e. the fourteenth day of Nisan , a month in the Jewish calendar .Passover always begins on the fifteenth of the month).Usually, the fast is broken at a siyum celebration (typically made at the conclusion of the morning services ), which, according to prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast (see Breaking the fast below).This fast commemorates the salvation of the Israelite firstborns during the Plague of the Firstborn (according to the Book of Exodus , the tenth of the ten plagues wrought upon Ancient Egypt prior to the Exodus of the Children of Israel ), when, according to Exodus (12:29): "...God struck every firstborn in the Land of Mitzrayim (Ancient Egypt)...." Unlike most Jewish fast days, only firstborns are required to fast on the Fast of the Firstborn.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 364307786.
The opening as it stood in 2015 1 passage from the previous snapshot no longer appear
Fast of the Firstborn ( , Ta'anit B'khorot or [ תענית בכורים ] Error: {{Lang}}: invalid parameter: |dir= ( help ) , Ta'anit B'khorim ); is a unique fast day in Judaism which usually falls on the day before Passover (i.e. the fourteenth day of Nisan , a month in the Jewish calendar . Passover always begins on the fifteenth of the Hebrew month). Usually, the fast is broken at a siyum celebration (typically made at the conclusion of the morning services ), which, according to prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast (see Breaking the fast below). Unlike most Jewish fast days, only firstborns are required to fast on the Fast of the Firstborn.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 662592614.
The opening as it stood in 2020 1 passage from the previous snapshot no longer appear
Fast of the Firstborn ( , Ta'anit B'khorot or תענית בכורים , Ta'anit B'khorim ); is a unique fast day in Judaism which usually falls on the day before Passover (i.e., the fourteenth day of Nisan , a month in the Jewish calendar ; Passover begins on the fifteenth of Nisan). Usually, the fast is broken at a siyum celebration (typically made at the conclusion of the morning services ), which, according to prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast (see Breaking the fast below). Unlike all other Jewish fast days, only firstborn children are required to fast on the Fast of the Firstborn.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 959901733.
The opening as it stood on October 6, 2023
Fast day in Judaism, preceding Passover Fast of the Firstborn ( , Ta'anit B'khorot or תענית בכורים , Ta'anit B'khorim ) is a unique fast day in Judaism which usually falls on the day before Passover (i.e., the fourteenth day of Nisan , a month in the Jewish calendar ; Passover begins on the fifteenth of Nisan). In modern times, the fast is usually broken at a siyum celebration (typically made at the conclusion of the morning services ), which, according to prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast (see Breaking the fast below). Unlike all other Jewish fast days, only firstborn children are required to fast on the Fast of the Firstborn.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1148376582.
The opening as it stood in 2025
Fast day in Judaism, preceding Passover Fast of the Firstborn ( Hebrew : תַעֲנִית בְּכוֹרוֹת , romanized : taʿăniṯ bəḵoroṯ or תַעֲנִית בְּכוֹרים taʿăniṯ bəḵorim ) is a unique fast day in Judaism , which usually falls on the day before Passover (i.e., 14 Nisan , a month in the Hebrew calendar ; Passover begins on 15 Nisan).In modern times, the fast is usually broken at a siyum celebration (typically made after Shaharit ), which, according to the prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast.Unlike all other Jewish fast days, only firstborn children must fast on this day.This fast commemorates the salvation of the Israelite firstborns during the Plague of the Firstborn (according to the Book of Exodus , the tenth of the ten plagues wrought upon Biblical Egypt before the Exodus ), when, according to Exodus (12:29): "In the middle of the night יהוה struck down all the [male] first-born in the land of Egypt, from the first-born of Pharaoh who sat on the throne to the first-born of the captive who was in the dungeon, and all the first-born of the cattle.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1284900129. This is our newest snapshot; the live article may have moved again since.
Today
Wikipedia's first sentence called it “unique jewish fast day which usually falls on the day before passover”. Today it says “unique fast day in judaism”. Read the current article and compare.
2005
2010
2015
2020
Oct '23
2025
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What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2005, and today's defining sentence is their current revision.
Then
unique jewish fast day which usually falls on the day before passover
Now
unique fast day in judaism
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.