"And David said unto Jonathan, 'Behold, tomorrow is the new moon, and I should not fail to sit with the king at meat: but let me go, that I may hide myself in the field unto the third day at even.'[...]And Jonathan said unto David, 'O YHWH God of Israel, when I have sounded my father about tomorrow any time, or the third day,[...]Then Jonathan said to David, 'Tomorrow is the new moon: and thou shalt be missed, because thy seat will be empty. And when thou hast stayed three days, then thou shalt go down quickly, and come to the place where thou didst hide thyself when the business was in hand, and shalt remain by the stone Ezel.'[...]So David hid himself in the field: and when the new moon was come, the king sat him down to eat meat. And the king sat upon his seat, as at other times, even upon a seat by the wall: and Jonathan arose, and Abner sat by Saul's side, and David's place was empty. Nevertheless Saul spake not any thing that day: for he thought, 'Something hath befallen him, he is not clean; surely he is not clean'. And it came to pass on the morrow, which was the second day of the month, that David's place was empty: and Saul said unto Jonathan his son, 'Wherefore cometh not the son of Jesse to meat, neither yesterday, nor today?'
- 1 Samuel 20:5, 12a, 18-19, 24-27
We see above that the understanding between David, Jesse, and king Saul was that there was no need to use the Moon to track the beginning of the months or, the days of the year: this means that they clearly understood that Moses did not instruct anywhere at anytime to use the Moon's phases nor, the barley to track the beginning of the months or the duration of the months: this is only possible if the calendar they used was solar. And in the passages I cited in post #15 show that the ancient Israelites never had to intercalate any seconds, minutes, days, weeks, months, or years--aside from the four seasonal days at the end of the 3rd, 6th, 9th, and 12th Months--to complete the year with exact precision.