Peter James ( Centuries of Darkness: A Challenge to the Chronology of Old World Archaeology ) notes: Going Ussher one better, “Dr John Lightfoot, author of the wonderfully titled A Few and New Observations on the book of Genesis, the most of them certain, the rest probably, all harmless, strange and rarely heard of before (1642), set the beginning of the world at the September Equinox. He later refined his calcaultion to match the start of the academic year at Cambridge (where, coincidentally, he was Vice-Chancellor), placing the Creation at precisely 9 a.m. on October 23.”

Sounds right to me.