Tuesday Nissan 1, Rosh Chodesh 5703

We do not say tachanun all month.

After saying the nassi (p. 368), we say the Yehi ratzon (p. 371) which is printed in Torah Or Siddur. Kohanin and levi'im also say it.1

Torah lessons: Chumash: Tazria, Shlishi with Rashi.
Tehillim: 1-9.
Tanya: But as for him (p. 193)...the Esoteric Discipline. (p. 193).

My father instructed his brother-in-law, R. Moshe Horenstein, a kohein, to say Yehi ratzon after the nassi, noting that even a kohein or leivi must say it, for it is related to ibur.2