What Are The Appointed Dates?

What are the appointed dates? The Hebrew calendar is based on the lunar cycle. The first evening of the new moon of each cycle can be observed in the sky denoted the beginning of a new month of the Hebrew calendar. According to the Bible, new moons are also cause for celebration. The Three Pilgrimage Festivals, in Hebrew Shalosh Regalim (שלוש רגלים), are three major festivals of the ancient Hebrews Israelites (Obara Fawarala)—Pesach (Passover), Shavuot (Weeks or Pentecost), and Sukkot (Tabernacles, Tents or Booths)—when the ancient Israelites (Fawaralah) living in the Kingdom of Judah would make a pilgrimage to Tabernacle on Mt. Zion in Jerusalem, as commanded. 

Ordainment of the Moon

The months in the sacred calendar are established as lunar months. Therefore the sighting of the new moon was ordained to establish the beginning of the monthly cycle and therefore the first day of the month. The moon's full cycle of illumination lasts a little over 29 days. Thus we have our biblical months of either 29 or 30 days.
The New Moon is a precise astronomical event and can occur on different days because of the rotation of the earth. The determination of the New Moon, therefore, must be determined from the time in which it occurs in Jerusalem (Arad) to ensure the uniformity of religious worship throughout the world, given increased communication.
This is based upon scripture which places Jerusalem as the throne of YHWY (Jeremiah 3:17), the centre-point of the Law which will be given under Messiah (Isaiah 2: 3) through the waters of the Spirit (Zechariah 8:22; 14:8-21). The Most High has placed His name there forever (2 Chronicles 33: 4). Before the time of modern calendars, the new moon was vitally important as it was the official announcement of when the new month had begun. Because YHWY gave commandment to observe the feasts and festivals in their given times, it was vital to keep accurate count of when the new month began (First site of the crescent moon) in order to celebrate the festivals correctly.
“YHWY spoke to Moses, saying: Speak to the children of Israel and say to them: YHWY’s appointed festivals that you are to designate as holy convocations — these are My appointed festivals.” (Leviticus 23:1-2) “These are the appointed festivals of YHWY ALLAH, the holy convocations, which you shall designate in their appropriate time.” (Leviticus 23:4).
The Most High is very clear that the festivals are to be celebrated, not because they are for man but because they are His appointed times. These festivals are holy, not because man makes them so, but because Yahweh Himself declares them holy. Since YHWY ALLAH is the One who instituted them, it is a reasonable act of worship and obedience to observe them which He designated. Also, the elders of Israel would confirm the sighting of the new moon based upon reliable witnesses and shofars were blown in accordance with the scripture to announce the beginning of the month.

Biblical Precedents