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Helek

Wikipedia's first sentence called it “unit of time used in the calculation of the hebrew calendar”. Today it says “unit of time used in the calculation of the molad”.
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Machine-checked against the full current article on 2026-08-03.
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The opening as it read in October 6, 2023

Time measurement in Jewish tradition The helek , also spelled chelek ( Hebrew חלק, meaning "portion", plural halakim חלקים) is a unit of time used in the calculation of the Molad . Other spellings used are chelak and chelek , both with plural chalakim . The hour is divided into 1080 halakim.1 A helek is 3 ⁠ 1 / 3 ⁠ seconds or / 18 minute. The helek derives from a small Babylonian time period called a she , meaning '"barleycorn", itself equal to / 72 of a Babylonian time degree (1° of celestial rotation). 360 degrees × 72 shes per degree / 24 hours = 1080 shes per hour. The Hebrew calendar defines its mean month to be exactly equal to 29 days 12 hours and 793 halakim, which is 29 days 12 hours 44 minutes and 3 ⁠ 1 / 3 ⁠ seconds. It defines its mean year as exactly 235/19 times this amount, or 365 days, 5 hours, 55 minutes, and 25 and 25/57 seconds (approximately 365.2468222 days).

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1177399761.
Today
Wikipedia's first sentence called it “unit of time used in the calculation of the hebrew calendar”. Today it says “unit of time used in the calculation of the molad”. Read the current article and compare.
201020152020Oct '232025
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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

unit of time used in the calculation of the hebrew calendar

Now

unit of time used in the calculation of the molad

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.

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