2 Timothy 3 ... Exodus 25 & 26 ... Hebrews 8 .... Isaiah 2 ...
What do you mean it's not written down? How else did you find them?
19 For the goodman is not at home, he is gone a long journey:
20 He hath taken a bag of money with him, and will come home at the day appointed.
Day [Yud-Vav-Mem] appointed, Kaf-Samech-Alef is New Moon Ben Yehuda’s Hebrew English Dictionary
Isaiah 26
Take Refuge from the Coming Judgment
20 Come, my people, enter your chambers,
And shut your doors behind you;
Hide yourself, as it were, for a little moment,
Until the indignation is past.
21 For behold, the LORD comes out of His place
To punish the inhabitants of the earth for their iniquity;
The earth will also disclose her blood,
And will no more cover her slain.
Hmmm, good advice, but no time frame. Better figure it out.
1. Teshuvah (repentance)
2. Rosh HaShanah (Head of the Year, Birthday of the World)
3. Yom Teruah (the Day of the Awakening Blast [Feast of Trumpets)
4. Yom HaDin (the Day of Judgment)
5. HaMelech (the Coronation of the Messiah)
6. Yom HaZikkaron (the Day of Remembrance or memorial)
7. The time of Jacob's (Ya'akov) trouble (the birthpangs of the Messiah, Chevlai shel Mashiach)
8. The opening of the gates
9. Kiddushin/Nesu'in (the wedding ceremony)
10. The resurrection of the dead (rapture, natza1)
11. The last trump (shofar)
12. Yom Hakeseh (the hidden day)
In Psalm (Tehillim) 27:5 it is written, "For in the time of trouble He shall hide me in His pavilion; in the secret of His tabernacle shall He hide me; He shall set me up upon a rock."
Yet another name for Rosh HaShanah is Yom HaKeseh, "The Day of the Hiding" or "the Hidden Day." The term keseh or keceh is derived from the Hebrew root kacah, which means to "conceal, cover, or hide." Every day during the month of Elul, a trumpet is blown to warn the people to turn back to G-d, except for the thirtieth day of Elul, the day preceding Rosh HaShanah. On that day the trumpet is not blown, and is therefore silent. This is because much about Rosh HaShanah is concealed and shrouded in mystery. The mystical aspect of Rosh HaShanah is indicated in Scripture: "Sound the shofar on the New Moon, in concealment of the day of our festival" (Psalm [Tehillim] 81:3). Satan, the accuser, is not to be given notice about the arrival of Rosh HaShanah, the Day of Judgment.
Rosh HaShanah is called Yom HaKeseh, or the Day of the Hiding, because it was hidden from satan (Ha satan), the adversary. The Bible says that satan comes to rob and to steal (John [Yochanan] 10:10, and to confuse (1 Corinthians 14:33). Because it is the Day of Judgment, it is symbolically hidden from satan (satan did not know and understand the plan of the cross [tree], First Corinthians 2:7-8). This was hidden from him as well. Believers never said when the day of Rosh HaShanah was; they simply said, "Of that day and hour no one knows, only the Father."
http://www.mayimhayim.org/Festivals/Feast7.htm
Rosh HaShanah is a Chodesh [New Moon]
What do you mean it's not written down? How else did you find them?
The New Moon in the Hebrew Bible
The Biblical month begins with the crescent New Moon, also called First Visible Sliver. The Hebrew word for month (Hodesh) literally means New Moon and only by extension the period between one New Moon and the next.
The Rabbanite Midrash relates that when God said to Moses "This month (HODESH) shall be for you the beginning of months" (Ex 12,2) the Almighty pointed up into the heavens at the crescent New Moon and said "When you see like this, sanctify! [=declare New Moon day]". This Rabbinic fairy-tale highlights an important point, namely that the Bible never comes out and says we should determine the beginning of months based on the New Moon. The reason for this is that the term for "Month" (Hodesh) itself implies that the month begins with the crescent New Moon. As will be seen, this would have been obvious to any ancient Israelite present when Moses recited the prophecies of YHWH to the Children of Israel and therefore there was no need to elucidate this concept any more than such terms as "light" or "dark". However, due to the long exile, we have lost the use of Biblical Hebrew in day to day speech. Therefore, we will have to reconstruct the meaning of Hodesh from the usage of the word in the Biblical text using sound linguistic principles.
http://www.karaite-korner.org/new_moon.shtml
And there's lot's more!