• Was the world created in six days?
In the Psalms, it says, “A thousand years in Your sight are as but yesterday.” Rabbi Isaac of Acco, who lived long before carbon dating, used that phrase to determine how long we are meant to believe it took God to Create the world. By using the above phrase, it appears that each God-day is equal to 1,000 man-years.
So, a God-year would equal 365,250 man-years. The Sefer Yetzirah refers to 7 universes, each lasting 7,000 years. If you multiply this out, each cycle would last 2.5 billion years. When I Googled this, I found that the first life on Earth probably emerged 3.5 to 4 billion years ago. That’s a big difference, but, within the same proximity of a modern estimate.
Now, some Kabbalists believe that the biblical account of creation represents the start of the 7th cycle. That means, that, as of Bereshit, the universe was 15.3 billion years old. Scientists now estimate that the universe began some 14 billion years ago.