חצי כסליו טבת וחצי שבט חורף חצי שבט אדר וחצי ניסן קור חצי ניסן אייר וחצי סיון קציר חצי סיון תמוז וחצי אב קיץ חצי אב אלול וחצי תשרי חום
An objection is raised: R. Simeon b. Gamaliel said on the authority of R. Meir, and R. Simeon b. Menasya said likewise: [The second] half of Tishri, Marcheshvan, and the first half of Kislev is seed-time; [the second] half of Kislev, Tebeth, and half Shebat are the winter months; [the second] half of Shebat, Adar, and [the first] half of Nisan, cold months; [the second] half of Nisan, Iyar, and [the first] half of Sivan is the period of harvests; [the second] half of Sivan, Tammuz, and the first half of Ab are summer; the second half of Ab, Ellul and the first half of Tishri, hot months. R. Judah counted [these periods] from [the beginning of] Tishri; R. Simeon, from Marcheshvan.<span class="x" onmousemove="('comment',' The passage is an explanation of the terms mentioned in Gen. VIII, 22: While the earth remaineth, seed-time ([H]) and harvest ([H]), and cold ([H]) and heat ([H]), summer ([H]) and winter ([H]), and day and night shall not cease.
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The Sabbath Epistle
Since the sun inclines north and south, the year is divided into four seasons, namely “winter and spring and summer and autumn” (Genesis 8:22). For “planting” is the half year when the sun is in the southern signs (autumn and winter), and “reaping” is when the sun is in the northern signs (spring and summer). The verse began with the winter days. This season commences when the sun is at its southern extremity (winter solstice). Then the days begin to lengthen and the nights to shorten. This season has cold and wet days. When the sun reaches the point of intersection (vernal equinox), then day and night are equal throughout the earth. This season (spring) has hot and wet days. From its commencement the days begin to be longer than the nights, for the sun bends towards the north. This season ends when the sun reaches its northern extremity (summer solstice). Then the next season (summer) begins. The sun recedes from the north and the days begin to shorten and the nights to lengthen. These days, which are the days of summer, are hot and dry. When the sun reaches the second point of intersection (autumnal equinox) the day and night are of equal length. From then on the days begin to be shorter than the nights, which grow longer. This season (autumn) has cold and dry days. Since the summer and autumn seasons are dry, Scripture states “this will be in summer and in autumn” (Zachariah 14:8). For at those times the rivers diminish, except for the Nile which originates from springs in the Mountains of the Moon to the south.
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