From Ra himself. He said the date was given to him, not worked out, during and after the experience in 1987 that he described as receiving the knowledge, and he called that source the Voice. In his model of 64 evolutionary steps, 1781 and 2027 were the only two dates he said he knew precisely. He named the day many times, as the Ides of February 2027, and gave a time only once. Take that for what it is: his account.
This is not a fact, not medical advice and not a promise of healing. It is part of the cosmology Ra Uru Hu, who founded Human Design, left behind, and nobody knows exactly how it will unfold.
Free, no account and no email. Every answer here was written by hand from what Ra Uru Hu left behind, not generated. Ask your own question at The 2027 Oracle.