Related for Rosh Hashanah 15:17

ממאי דתשרי הוא דכתיב (תהלים פא, ד) תקעו בחדש שופר בכסה ליום חגנו איזהו חג

If you like I can say that R'Hisda explains the Mishnah here in the same way as R'Zera, since R'Zera said [that it<span class="x" onmousemove="('comment',' The statement ON THE FIRST OF TISHRI IS THE NEW YEAR FOR YEARS.');">¹⁴</span> means], for reckoning cycles,<span class="x" onmousemove="('comment',' I.e., the cycle of Tishri is the first of the four cycles of the year, v. infra p. 43, n. 9. The year is divided into four cycles called Tekufoth, the Tekufah of Nisan (Vernal Equinox) ; Tammuz (Summer Solstice) ; Tishri (Autumn Equinox) ; Tebeth (Winter Solstice) . The term Tekufah is also applied to the season itself.');">¹⁵</span> in this following the view of R'Eleazar, who said that the world was created in Tishri.<span class="x" onmousemove="('comment',' V. infra 10b.');">¹⁶</span> R'Nahman B'Isaac [explained the Mishnah to refer] to the Divine judgment 'as it is written, From the beginning of the year to the end of the year,<span class="x" onmousemove="('comment',' Deut. XI, 12. The verse continues, the eyes of the Lord thy God are always upon it (the land of Canaan) .');">¹⁷</span> [which means], From the beginning of the year sentence is passed as to what shall be up to the end of it. How do we know that this takes place in Tishri? - Because it is written, Blow the horn at the new moon, at the covered time [keseh]<span class="x" onmousemove="('comment',' E.V., 'appointed time', or 'full moon'.');">¹⁸</span> for our feastday.<span class="x" onmousemove="('comment',' Ps. LXXXI, 4.');">¹⁹</span> Which is the feast

Tosefta Rosh Hashanah (Lieberman)