Wikipedia's first sentence called it “unique agricultural calendar system thought to be of amorite origin in which the year is broken down into seven”. Today it says “agricultural calendar system thought to be of amorite origin in which the year is broken down into seven period”.
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 2025
Ancient western Mesopotamian calendar using 7 periods of 50 days The pentecontad calendar (from Koine Greek : πεντηκοστή , romanized: pentēkostē , lit. ' fiftieth ' ) is an agricultural calendar system thought to be of Amorite origin in which the year is broken down into seven periods of fifty days (a total of 350 days), with an annual supplement of fifteen or sixteen days. Identified and reconstructed by Julius and Hildegaard Lewy in the 1940s, the calendar's use dates back to at least the 3rd millennium BCE in western Mesopotamia and surrounding areas. Used well into the modern age, forms of it have been found in Nestorianism and among the Fellahin of modern Palestine .
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1296842194.
The opening as it stood in 2010
The Pentecontad Calendar is a unique agricultural calendar system thought to be of Amorite origin in which the year is broken down into seven periods of fifty days ( total of 350 days ), with an annual supplement of fifteen or sixteen days. Identified and reconstructed by Hildegaard and Julius Lewy in the 1940s, the calendar's use dates back to at least the 3rd millennium BCE in Western Mesopotamia and surrounding areas. Used well into the modern age, forms of it have been found in Nestorianism and among the fellaheen of modern Palestine .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 330066038.
The opening as it stood in 2015
The Pentecontad Calendar is a unique agricultural calendar system thought to be of Amorite origin in which the year is broken down into seven periods of fifty days ( total of 350 days ), with an annual supplement of fifteen or sixteen days. Identified and reconstructed by Hildegaard and Julius Lewy in the 1940s, the calendar's use dates back to at least the 3rd millennium BCE in western Mesopotamia and surrounding areas. Used well into the modern age, forms of it have been found in Nestorianism and among the fellaheen of modern Palestine .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 660068045.
The opening as it stood in 2020
Ancient western Mesopotamian calendar using 7 periods of 50 days The pentecontad calendar (from πεντηκοντάς pentēkontás ) is an agricultural calendar system thought to be of Amorite origin in which the year is broken down into seven periods of fifty days (a total of 350 days), with an annual supplement of fifteen or sixteen days. Identified and reconstructed by Julius and Hildegaard Lewy in the 1940s, the calendar's use dates back to at least the 3rd millennium BCE in western Mesopotamia and surrounding areas. Used well into the modern age, forms of it have been found in Nestorianism and among the Fellahin of modern Palestine .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 949038648.
Today
Wikipedia's first sentence called it “unique agricultural calendar system thought to be of amorite origin in which the year is broken down into seven”. Today it says “agricultural calendar system thought to be of amorite origin in which the year is broken down into seven period”. Read the current article and compare.
2010
2015
2020
Oct '23
2025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.
What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.
Then
unique agricultural calendar system thought to be of amorite origin in which the year is broken down into seven
Now
agricultural calendar system thought to be of amorite origin in which the year is broken down into seven period
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.
