תִּקְע֣וּ בַחֹ֣דֶשׁ שׁוֹפָ֑ר בַּ֝כֵּ֗סֶה לְי֣וֹם חַגֵּֽנוּ׃
Дуй рогом в новолуние, в полнолуние на наш праздник.
Rashi
on the appointed time The appointed day for it, and so (Prov. 7:20): “on the appointed day (בכסה) he will come home”; to the appointed time that had been fixed.