11 On your new moons you shall present a burnt offering to Hashem: two bulls of the herd, one ram, and seven yearling lambs, without blemish.
uv-ro-SHAY khod-shay-KHEM tak-REE-vu o-LAH la-do-NAI pa-REEM b’-nay va-KAR sh’-NA-yim v’-A-yil e-KHAD k’-va-SEEM b’-NAY sha-NAH shiv-AH t’-mee-MIM
יא וּבְרָאשֵׁי חָדְשֵׁיכֶם תַּקְרִיבוּ עֹלָה לַיהֹוָה פָּרִים בְּנֵי־בָקָר שְׁנַיִם וְאַיִל אֶחָד כְּבָשִׂים בְּנֵי־שָׁנָה שִׁבְעָה תְּמִימִם׃
28:11 On your new moons
Judaism follows a calendar with both lunar and solar components. The months are determined by the cycle of the moon, with the new month beginning when the first sliver of moon reappears in the sky at the beginning of a new lunar cycle. At the same time, though, the Jewish calendar has a solar component. Each of the festivals are supposed to fall out during a specific season in Israel, reflected in the agricultural aspects of the holiday. Pesach must fall out during the springtime as the grain begins to ripen, Shavuot celebrates the wheat harvest and the beginning of the fruit harvest in early summer, and Sukkot is celebrated in the beginning of the autumn, at the end of the harvest season. There is, however, an eleven-day discrepancy between the number of days in twelve lunar months and a solar year. To enable the months to follow the cycle of the moon while also ensuring that the holidays are celebrated in the appropriate seasons, a thirteenth month is added to the year seven times in every nineteen-year cycle.