On the first day, they programmed the terraforming equipment.
On the second, they did routine maintenance, then removed the genetically enhanced lifeforms from the ship’s stasis chambers.
On the third day, the new species were released onto the surface of the newly habitable world.
On the fourth day, the terraforming equipment malfunctioned, causing massive flooding and necessitating the immediate evacuation of the planet by the original three explorers.
On the fifth day, their craft crashed onto the surface of the planet. They re-evaluated their decision to use a robot mechanic instead of a humanoid one, once the mechanic broke down.
On the sixth day, they sent out distress signals, hoping against hope for a rescue party to retrieve them from the remote, ass-end of the galaxy.
On the seventh day, they resigned themselves to being stranded away from the civilization they had known.
Their current practical needs made them bitterly regret their precautions against corporate espionage which had caused then to shroud their mission in such secrecy.
Due to relativistic time dilation, they set their still functioning stasis pods to wake them in alternating century intervals, in the vain hope that future explorers would discover their whereabouts.