On the Torah's calendar, the month of Iyyar falls between the great month of redemption (i.e., Nisan) and the third month of revelation (Sivan), and is therefore primarily regarded as a "month of passage" to prepare us for the revelation given at Sinai (Shavuot). Every day of this new month is counted in anticipation of the coming time of Shavuot.
יְהִי רָצוֹן מִלְּפָנֵיךָ יהוה אֱלהֵינוּ וֵאלהֵי אֲבוֹתֵינוּ
שֶׁתְּחַדֵּשׁ עָלֵינוּ חדֶשׁ טוֹב בַּאֲדנֵינוּ יֵשׁוּעַ הַמָּשִׁיחַ אָמֵן
ye·hi · ra·tzon · mil·fa·ne·kha · Adonai · E·lo·hei·nu · ve·lo·hei · a·vo·tei·nu
she·te·cha·desh · a·lei·nu · cho·desh · tov · ba·a·do·nei·nu · Ye·shu·a · ha·ma·shi·ach · amen
"May it be Your will, LORD our God and God of our fathers,
that you renew for us a good month in our Lord Yeshua the Messiah. Amen."
Download Study Card
Note: Regarding the date for the new month, I follow the "standard" calendar system used by the Jewish community living in the Diaspora worldwide. Rosh Chodesh is celebrated for two days on months with just 29 days, so it will begin a day "early" for Iyyar, that is, on Nisan 30, which this year begins Saturday, April 18th after sundown.