Actually, in my previous silly example, forget about Jesus. Lets use numbers for this rather silly answer. In Brighton, the tide fell from about 5.3m to a touch under 2m between 3am and 6am this morning, according to the UK Hydrographic Office. Being a bit cautious, we'll call it a metre an hour. Everest is 8846 metres above sea level. So the earliest anyone could have stood on dry land is about 8840 hours before 3am this morning.

So anyone claiming to have stood on dry land before 7pm GMT on the 22nd of March 2003 is as much a liar as those "scientists" who insist the universe is billions of years old!