Further back, the Earth day had about 17 hours, and there were 514 33 days per year.
"To come two decades through time, and then die because we were one Earth day late."
One revolution around the star takes only a little less than three Earth days to complete.
Earth Day has now been observed in more than 175 nations.
The debate was not called to order, however, for the equivalent of three more Earth days.
In another two Earth days it would be gone, for an eternal week.
Tim returns after two earth days, which have been years in space for him.
Earth Day and all the recent concern for the environment has made a real difference.
"Those ships will be here inside an Earth day," he said.
Earth Day has retained at least one of its original elements.