Halakhah for Megillah 3:5
בְּפֶסַח קוֹרִין בְּפָרָשַׁת מוֹעֲדוֹת שֶׁל תּוֹרַת כֹּהֲנִים (ויקרא כב). בַּעֲצֶרֶת, שִׁבְעָה שָׁבֻעוֹת (דברים טז). בְּרֹאשׁ הַשָּׁנָה, בַּחֹדֶשׁ הַשְּׁבִיעִי בְּאֶחָד לַחֹדֶשׁ (ויקרא כג). בְּיוֹם הַכִּפּוּרִים, אַחֲרֵי מוֹת (שם טז). בְּיוֹם טוֹב הָרִאשׁוֹן שֶׁל חָג קוֹרִין בְּפָרָשַׁת מוֹעֲדוֹת שֶׁבְּתוֹרַת כֹּהֲנִים (ויקרא כג), וּבִשְׁאָר כָּל יְמוֹת הֶחָג בְּקָרְבְּנוֹת הֶחָג (במדבר כט):
On Pesach we read in the section of the festivals in Leviticus [(22:26) This, on the first day. Nowadays, the custom is to read (Exodus 12:21). And the haftarah is (Joshua 5:2). On the second day (Leviticus 22:26); the haftarah (II Kings 23:1). On the third day (Exodus 13:2). On the fourth day (Exodus 22:24). On the fifth day (Exodus 34:1). On the sixth day (Numbers 9:2). On the seventh day (Exodus 14:17); the haftarah (II Samuel 22:1). On the eighth day (the last day of the festival in the exile) (Deuteronomy 15:9); the haftarah (Isaiah 10:32).] On Shavuoth, "Shivah shavuoth" (Deuteronomy 16:9). On Rosh Hashanah, "In the seventh month, on the first day of the month" (Leviticus 23:23). On Yom Kippur, "Acharei Moth" (Leviticus 16:1). On the first day of Succoth we read in the section of the festivals in Leviticus. And the rest of the days of the festival, (we read of) the offerings of the festival. [On Shavuoth, on the first day of the festival (Exodus 19:1); the haftarah (Ezekiel 1). On the second day (Deuteronomy 16:9); the haftarah (Habakkuk 2:20). On Rosh Hashanah (Genesis 21:1): "And the L-rd remembered Sarah…" (for on Rosh Hashanah Sarah was remembered.") And the haftarah (I Samuel 1:1), concerning Channah; for she, too, was remembered on Rosh Hashanah. On the second day, (Genesis 22:1), on the binding of Isaac; the haftarah (Jeremiah 31:1). On Yom Kippur, shacharith, (Leviticus 16:1); the haftarah (Isaiah 57:14). Minchah: (Leviticus 18:1); the haftarah (Yonah 1:1). On Succoth, both festival days (Exodus 12:21); the haftarah: on the first day (Zechariah 14:1); on the second (I Kings 8:2). And all the rest of the days of the festival, we read of the offerings of the festival. How so? On the third day, the first day of Chol Hamoed, the Cohein reads (Numbers 29:17): "And on the second day." The Levite reads: "And on the third day." The Israelite reads: "And on the fourth day. The fourth goes back and reads: "And on the second day," "And on the third day." On the fourth day, the Cohein reads: "And on the third day." The Levite reads: "And on the fourth day." The Israelite reads: "And on the fifth day." And the fourth goes back and reads: "And on the third day and on the fourth day." And so with all. On the last day of the festival (i.e., Shmini Atzereth) (Deuteronomy 15:19); the haftarah (I Kings 8:54). And on the next day (Simchath Torah) (Deuteronomy 33:1); the haftarah (Joshua 1:1). And on a Sabbath that falls out on Chol Hamoed, both on Pesach and on Succoth, we read (Exodus 33:12); and, the haftarah; on Pesach the vision of the dry bones (Ezekiel 37:1); and, on Succoth (Ezekiel 38:18): "On the day that Gog comes, etc." For we have a tradition that the resurrection will occur on Pesach and the war of Gog and Magog, on Succoth.]