What have Jehovah’s Witnesses said is the length of a Lunar year?
354 days – 1990 All Scripture is Inspired p. 281 par. 20 Study Number 2—Time and the Holy Scriptures
The common lunar year of 12 lunar months has 354 days
354 days – 1988 Insight on the Scriptures Vol. 2 p. 1214 Year
The common lunar year has 354 days
360 days – The Watchtower 8/1/1983 p. 21 par. 18 Israel and the “Times of the Gentiles”
In the Bible’s prophetic count of time, a lunar year is calculated as amounting to 360 days.
360 days – The Watchtower 1/1/1983 p. 11 par. 3 The Kingdom Issue to the Fore!
The years contained in each time would amount to the number of days in a prophetic lunar year, namely, 360 days.
354 days – 1981 kc chap. 14 p. 135 The King Reigns!
a lunar year of 354 days
360 days – The Watchtower 4/1/1959 p. 216 par. 40 Part 11—”Your Will Be Done on Earth”
In Nebuchadnezzar’s case a “time” stood for a lunar year, the average of which was reckoned as 360 days.
Note: Truthfully, a lunar year has 354 days. This does not help when trying to interpret prophecy, so a ‘prophetic lunar year’ is said to last 360 days instead. This is no different from when CT Russell calculated 1914 by measuring a pyramid, only to find that regular inches did not add up correctly. He therefore invented a different unit of measurement called ‘pyramid inches’ so that his dates worked out.