Other young Earth creationists believe that the Earth and the universe were created with the appearance of age, so that the world appears to be much older than it is, and that this appearance is what gives the geological findings and other methods of dating the Earth and the universe their much longer timelines.
The Christian organizations Institute for Creation Research (ICR) and the Creation Research Society (CRS) both promote young Earth creationism in the US.
Young Earth creationists believe that God created the Earth within the last ten thousand years, literally as described in the Genesis creation narrative, within the approximate time-frame of biblical genealogies (detailed for example in the Ussher chronology).
This version of creationism relies on a particular interpretation of Genesis 1:1–2.
It is considered that the words formless and void in fact denote waste and ruin, taking into account the original Hebrew and other places these words are used in the Old Testament.
This group generally believes that the age of the universe and the age of the Earth are as described by astronomers and geologists, but that details of modern evolutionary theory are questionable.
Gap creationism, also called "restoration creationism," holds that life was recently created on a pre-existing old Earth.
Genesis 1:1–2 is consequently translated: Thus, the six days of creation (verse 3 onwards) start sometime after the Earth was "without form and void." This allows an indefinite "gap" of time to be inserted after the original creation of the universe, but prior to the creation according to Genesis, (when present biological species and humanity were created).
Gap theorists can therefore agree with the scientific consensus regarding the age of the Earth and universe, while maintaining a literal interpretation of the biblical text.This version of creationism often states that the Hebrew word "yôm," in the context of Genesis 1, can be properly interpreted as "age." Some adherents claim we are still living in the seventh age ("seventh day").Strictly speaking, day-age creationism is not so much a version of creationism as a hermeneutic option which may be combined with other versions of creationism such as progressive creationism.Some gap creationists expand the basic version of creationism by proposing a "primordial creation" of biological life within the "gap" of time.This is thought to be "the world that then was" mentioned in 2 Peter 3:3–7.Day-age creationism states that the "six days" of the Book of Genesis are not ordinary 24-hour days, but rather much longer periods (for instance, each "day" could be the equivalent of millions, or billions of years of human time).