The Hebrew word Yom means 24 hours, a solar day ,exodus 20 : 8-11 Israel were to work for six days and rest on the 7th day "Yom " same word used in genesis. So not a thousand years.
Majority of Christian religions believed a 150 years ago that the creation account was made up of 7 days of 24 hours period. It was only pesky science that made them change their time scale.
So the serpent in the story didn't lie ,they didn't die in a day ,yom a 24 hour period of time.
The Adam and eve story is a myth, there's a similar story in the epic tales of galgermesh.