Rosh Chodesh Nissan

Hachodesh Asher Yeshuos Bo Makifos *

The gemoro (Shabboss87b) says that the first day of Nissan, the second year in the Midbar, The  Mishkan was erected and that day was crowned with ten firsts.

One of them  was the first day of the week.(Sunday).

Tosfos (Menachos 30a) quotes the Seder Olam that Moshe Rabbeinu was niftar on a Friday.(7th. Adar)

Many Rishonim hold ,In the Midbar where the Ananei Hakovod covered the moon, they were mekadesh the Chodesh al pi cheshbon and not with eidei riyah.

Reb Michoel Ber Weissmandel asked, according to Cheshbon if the 1st. of Nissan falls on a Sunday then the 7th of Adar is not on a Friday.

* Yotzer P. Hachodesh Musaf

Possible solution to R. Weissmandel's zt"l question:

The Gemoro asks  who wrote the last eight Pesukim in the Torah (Vayomos Shom Moshe-)

and  answers two tirutzim.

The Zohar  has a third answer. "Moshe was niftar and Hashem brought him back

to life. Moshe wrote then the last eight Pesukim, and died again."

The Malbim has a beautiful  pshat on the Pasuk  “Toras Hashem Temima”-The Torah

is complete – “Meshivas Nofesh”- because Hashem brought back the nefesh of Moshe

to complete the last eight Pesukim in the Torah.

With this Zohar we might be able to answer R.Weissmandel’s question. (also Tosfos

Kushyos.)

It is possible that Moshe died on Friday the 6^th of Adar. He was brought back to life

and wrote the 13 Sifrei Toras on Friday. He died again on Shabbos the 7^th of Adar.*

*Tosfos quotes the Seder Olam Friday the 7^th Adar