I saw in the recent Hakhel email that as Chasam Sofer calculated it, Eisav died on the Asara B'Teves. This led me to link to one of my most popular (in the number of clicks) postings, here: The Fast of the 9th of Teves and Yeshu Hanotsri.
There seems to be pattern, between the translation of the Torah into Greek (8th of Teves), 9th of Teves (its penetration into the Gentile world) and the destruction of the Beit Hamikdash on the 10th.
Food for thought!

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