A friend gave me an article to read about a different Hebrew calendar (which I shall not name). It's off the calculated calendar by 8 days. Folks, the calendar can be off the calculated by a day or two either way, or by a whole month, but a week or two is impossible. #smh
This calendar is supposedly derived from the Dead Sea Scrolls. The article never actually quoted the DSS, but hey, who's counting. Something to realize about the Dead Sea Scrolls is that they come from a library we all want to be able to read but we would never blindly adopt the practices of those who held the library.
Just like we wish the library at Alexandria was never burnt down, we would never blindly adopt the beliefs and practices of those who kept that library, either. The same holds true with the DSS.
The Essenes existed at the time of Yeshua and are not mentioned in the New Testament at all. Josephus is the place to look if you want to know about them. Some of their practices are reasonable, others extreme. But the fact that they existed when Yeshua walked the earth, were contemporaries with the Pharisees and Sadducees, but are completely omitted from the Bible, means they are irrelevant to our faith.
Any doctrine you encounter that contradicts the Masoretic Text and the Septuagint needs to be rejected. Those two sources are remarkably aligned.
But I am afraid that, as the serpent deceived Eve by his craftiness, your minds will be led astray from the simplicity and purity of devotion to Christ. For if one comes and preaches another Jesus whom we have not preached, or you receive a different spirit which you have not received, or a different gospel which you have not accepted, you bear this beautifully.
Here's a detailed explanation of what to do and when to do it to commemorate Yeshua in the way of the first century believers. If you're new at this, this is a great message to get the details and understanding the timing of everything.
John 5:46-47 phbt 46 For if you had trusted Moses, you would also trust me, for he wrote about Me. 47 And if you do not believe his writings, how will you believe my words?"
Exodus 12:14 World English Bible
This day shall be a memorial for you. You shall keep it as a feast to Yahweh. You shall keep it as a feast throughout your generations by an ordinance FOREVER.
Exodus 12:17 And ye shall observe the feast of unleavened bread; for in this selfsame day have I brought your armies out of the land of Egypt: therefore shall ye observe this day in your generations by an ordinance for ever.
Exodus 12:24 And ye shall observe this thing for an ordinance to thee and to thy sons for ever.
Exodus 31:17 It is a sign between me and the children of Israel for ever: for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed.
Moses said that the law is forever.