Rabbi Tuly Weisz discusses the significance of the Fast of the Tenth of Tevet, and why this day holds significance for both Jews and non-Jews. This day commemorates not only the siege around Jerusalem by the Babylonian king Nebuchadnezzar, but also the translating of the Torah (Hebrew Bible) into Greek for the first time. While at the time this was a calamity for the Jewish People, now much good comes from non-Jews being able to study the Bible.
Why Should Christians Care About The Fast Of Tevet?

וַיְהִי֩ בִשְׁנַ֨ת הַתְּשִׁיעִ֜ית לְמׇלְכ֗וֹ בַּחֹ֣דֶשׁ הָעֲשִׂירִי֮ בֶּעָשׂ֣וֹר לַחֹ֒דֶשׁ֒ בָּ֠א נְבֻכַדְנֶאצַּ֨ר מֶלֶךְ־בָּבֶ֜ל ה֧וּא וְכׇל־חֵיל֛וֹ עַל־יְרוּשָׁלַ֖͏ִם וַיִּ֣חַן עָלֶ֑יהָ וַיִּבְנ֥וּ עָלֶ֛יהָ דָּיֵ֖ק סָבִֽיב׃ And in the ninth year of his reign, on the tenth day of the tenth month, Nebuchadnezzar moved against Yerushalayim with his whole army. He besieged it; and they built towers against it all around. vai-HI, vi-sh'-NAT ha-t'-shi-EET l'-mol-KHO ba-KHO-desh ha-a-see-REE b'-a-SOR la-KHO-desh, ba-A ne-vu-khad-ne-tzar mel-ek ba-VEL, HU v'-kol-KHE-lo al-y'-ru-sha-LA-im, va-YI-khan a-LE-ha, va-YI-v'-NU a-LE-ha da-YEK sa-VEEV