Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[200] Now all was finished. Besaleel and Aholiab appeared to be the most skillful of the workmen; for they invented finer works than what others had done before them, and were of great abilities to gain notions of what they were formerly ignorant of; and of these, Besaleel was judged to be the best. Now the whole time they were about this work was the interval of seven months; and after this it was that was ended the first year since their departure out of Egypt. But at the beginning of the second year, on the month Xanthicus, as the Macedonians call it, but on the month Nisan, as the Hebrews call it, on the new moon, they consecrated the tabernacle, and all its vessels, which I have already described.