Q. See question above. Why is the Yom Hameyuchas so important and essential?
A. Yom Hameyuchas finds itself between Rosh Chodesh Sivan and the start of the “shloshes yemei hagbala,“ the three days which Moshe Rabbeinu instructed the Jewish people to place great effort to prepare themselves for receiving the Torah. Our Talmud teaches us that any day that is placed between two festive or distinctive Holy days is also to be considered a festive day, as well.
It is on this day that Moshe Rabbeinu told the Jewish people that they are to be a “Nation of Priests” and “Holy Nation.” (Exodus 19:6 and Rashi) The Jewish people responded with the historical celebrated cry of “Na’aseh V’nishma” - “Everything that Hashem has commanded we will do!” (Exodus 19:8)
It also explains that the true translation of “Meyuchas” is “lineage” and honourable background As such, Yom Hameyuchas is an opportunity for us to reflect on the fact that when it comes to Torah, it is not your lineage that makes you special, but rather your dedication to Torah learning and and mitzvot. This is an important message in advance of Shavuot. Every person can create his own special lineage and pedigree! Any Jew who keeps the Torah has his own “Yichus!”
Finally, we must mention a most important preparation day, since Yom Hameyuchas is always the same day of the week as the upcoming Yom Kippur.