Rabbi Yitzchak ben Sid, in the year 5012 of the sixth millennium, the last day of May, the king, the wise Don Alfonso who loved the wisdoms and especially astronomy, requested of him to make his tables. And all the sages of the nations broke their tables and adopted his tables [(Yuchsin in the generations of the Acharonim)]:

Some of the authors of the Tosafot were in the year 5012 of the sixth millennium, [(see above year 4935)], thus the Tosafot, chapter 1 of Avodah Zarah (9) on the words "From when, etc.":