Christians have long agreed on the foundational truth that God is the Creator of the universe, Earth, and Earth’s life. Where many differ is not in devotion to Scripture, but in how they interpret the “days” described in Genesis 1.
Some understand these days as six consecutive 24-hour periods, a view known as young-earth creationism. Others read the same text and conclude that the word “day” (the Hebrew word yôm) represents longer periods of God’s creative activity. This approach is often called old-earth creationism.
Both perspectives begin with Scripture and seek to honor its authority. The difference lies in how each interprets the language and structure of the creation account, not in their commitment to God or his Word.
For Christians who wonder how scientific evidence for an ancient universe fits with a faithful reading of Genesis, old-earth creationism represents a historical understanding of God’s two revelations. It holds that God is both the Author of Scripture and the Creator of the natural world. Therefore, the two won’t ultimately contradict each other. God’s “two books”—the Bible and the created world—work together to reveal the same Creator.
Old-earth creationists recognize that while God’s two books are wholly reliable, human interpretations of both are not. Theology is our attempt to interpret Scripture; science is our attempt to interpret the natural world. No one has complete knowledge of either, and our assumptions can lead us astray. So when our theology and our science seem to conflict, old-earth creationists see that tension not as a reason to dismiss one or the other, but as a call from God to study both more carefully.
In the following sections, we’ll explore what old-earth creationists believe, how they interpret the creation days in Genesis, how their view compares to other creation perspectives, and why this discussion matters for Christians who want to take both the Bible and the evidence of nature seriously.
What Is Old-Earth Creationism?
Old-earth creationism is the view that God created the universe, Earth, and all life over long periods of time—billions rather than thousands of years.
Where it differs from young-earth creationism (YEC) is in timing. The old-earth creation view asserts that the “days” of Genesis are not 24 hours each, but rather long spans of God’s creative activity.
From an old-earth creationism perspective, scientific evidence for an ancient universe and Earth—including radiometric dating, geological records, expansion of the universe, and the light from distant stars and galaxies—is consistent with God’s creative work and with Scripture.
Current scientific measurements place the age of the universe at roughly 13.8 billion years and the age of the Earth at about 4.6 billion years.
This idea that the six creation days may not be six 24-hour periods has deep historical roots. Early Jewish and Christian thinkers, including Philo, Clement of Alexandria, Origen, Basil, and Augustine, allowed for creation time periods other than 144 hours. This means the idea of long creation days is not a modern compromise with science. It predates modern science by more than a thousand years
What Do Old-Earth Creationists Believe?
Old-earth creationists like those at Reasons to Believe see the universe as ancient—billions of years old—yet shaped and designed by a personal, purposeful God. Their core convictions include that God reveals himself through both Scripture and the natural world (dual revelation); that the “days” of Genesis represent long, consecutive time periods (the day-age view); that God directly created new forms of life at key moments in Earth’s history; and that Adam and Eve were real, historical individuals from whom all humanity descends. We explore these more fully below.
Is Old-Earth Creationism Biblical?
How can we assess if old-earth creationism is biblical? For many, this is less a question of “Could God create in six days?” but “What does Genesis mean by ‘day’?”
This matters because our answer shapes whether Christians see science as a threat to their faith or as a witness to the same God who inspired Scripture.
The Hebrew word translated as day, yôm, has four literal definitions: part of the daylight hours, all the daylight hours, a 24-hour calendar day, or a long, finite time period. Old-earth creationists hold that the context of Genesis 1 supports the fourth meaning. (For a deeper look at what the Bible says about Earth’s age, see this blog post.)
Core Tenets of Old-Earth Creationism
If Scripture and creation truly speak in harmony, what does that look like in practice? Old-earth creationists ground their view in several core convictions:
Dual Revelation
Old-earth creationists hold to the historic Christian teaching, often called dual revelation, that God reveals himself through both Scripture and the natural world. Because both come from a God for whom it is impossible to lie (Hebrews 6:18), they work together in harmony. This is not a modern idea—the Belgic Confession (1561) describes creation as “a beautiful book” through which God makes himself known, alongside his written Word (drawn from Psalm 19:1–9 and Romans 1:20). Reasons to Believe (RTB), founded in 1986 by astrophysicist Hugh Ross, has been a leading voice for this view, showing how science and Scripture function as two independent witnesses that corroborate one another where they overlap.
A Universe Both Ancient and Faithful
Multiple independent lines of evidence, from astronomy to geology to nuclear physics, converge on the same picture: an ancient cosmos, roughly 13.8 billion years old, on an Earth about 4.6 billion years old. The prophet Jeremiah reminds us why we can trust these measurements: God made the laws that govern heaven and earth fixed and unchanging (Jeremiah 33:25). The constancy of natural laws over billions of years reflects the faithfulness of the God who set them in place.
Day-Age View
Why do we interpret the Genesis 1 creation days as consecutive long time periods?
One of the literal definitions for yôm (day) is a long, finite time period. The Hebrew words for evening (‘ereb) and morning (boqer) can likewise mean ending and beginning. The first six creation days all conclude with an “evening was, morning was” phrase—but the seventh day has no such marker. This implies God’s seventh day has not yet ended, a reading confirmed by both Psalm 95:11 and Hebrews 4:1–11, which state that we are still in God’s seventh day.
If the seventh day has lasted thousands of years at minimum, it is not a 24-hour day. The scientific evidence confirms this pattern. The fossil record documents the appearance of new species throughout Earth’s pre-human history, but no new species have appeared since humans arrived on the scene. This is exactly what we’d expect if God ceased his creation work on the seventh day, as Genesis 2 describes.
Genesis 1:27 says God created humans, male and female, during the sixth day. Genesis 2 details what happened within that day: God created Adam, placed him in Eden, had him tend the garden, observe all the animals, and name each one. Only after all this did God create Eve. When Adam first saw her, the word he spoke—happa’am—means “at long last.” Both the number of events and Adam’s own response suggest the sixth day, like the seventh, was far longer than 24 hours.
Some assert that the fourth of the ten commandments implies 24-hour creation days. However, the Bible addresses Sabbath periods of different durations.
Direct Creation
Old-earth creationists accept that species adapt within their kind—what scientists call microevolution. But they hold that natural processes alone cannot explain the sudden appearance of new, complex life-forms in the fossil record or the unique capacities of human beings. These transitions in the fossil record reflect moments of direct divine action, with God introducing new forms of life at different points in Earth’s history, consistent with the pattern presented in Genesis 1.
This view rejects macroevolution—the idea that all life descends from a single common ancestor through undirected processes. Instead, the complexity of living organisms, the fine-tuning of their systems, and the gaps in the fossil record point to a God who actively and purposefully created life throughout Earth’s long history.
Historical Adam and Eve
Old-earth creationists affirm that Adam and Eve were real, historical individuals specially created by God, from whom all human beings are descended. Adam was formed from the dust of the ground and given life when God breathed into him; Eve was created directly by God from Adam’s side.
This sets humanity apart from all other creatures and establishes humans as bearers of God’s image. Because Adam and Eve are historical, the doctrines that depend on them—the fall, original sin, and Christ’s redemption of a fallen humanity—stand on historical ground, not metaphor.
The Flood That Swept Humanity
According to the old-earth creationism view, the Genesis flood destroyed all humans outside the ark and their domesticated animals—but not the entire planet. It was worldwide in the sense that the whole world of ungodly people was wiped out (2 Peter 2:5). Noah and his family were the only survivors.
Regions not occupied by humans were not flooded. The Hebrew supports this reading. The word used throughout the flood account, eretz, often translated “earth,” can also mean “land” or “region.” The second most common word, ‘adama, refers to land inhabited or tilled by humans—which makes sense, since only land inhabited by humans can be damaged by human sin. In Genesis 8, haraba is used for the flooded land, a Hebrew word that never refers to the entirety of Earth’s land surface. The purpose of the flood was to rid the world of human wickedness and prevent humanity’s self-destruction. This reading affirms the authority of Scripture and the historicity of the flood while remaining consistent with evidence from geology, genetics, and archaeology.
Death Before the Fall
How could death exist before the rebellion in Eden? Paul tells us, “sin entered the world through one man, and death through sin, and in this way death came to all people” (Romans 5:12). Of all Earth’s creatures, only humans sin. By saying death came to all people, rather than all life, Paul implies that microbial, plant, and animal death occurred before Adam and Eve.
Scripture reinforces this picture. Job describes a world where lions hunt and feed by God’s design (Job 38:39), and the psalmist says lions “seek their food from God” (Psalm 104:21). Animal death is not a punishment for human sin but part of the ecosystem God established. The scientific evidence agrees. The fossil record shows that animal death and extinction occurred long before modern humans appeared. The enormous abundance of biodeposits—coal, oil, natural gas, limestone, marble, gypsum—testifies to ages of life and death before humans were created.
A common concern is that death before the fall undermines the gospel. But this view preserves the doctrines that matter most: the uniqueness of humanity as God’s image-bearers, the reality of Adam’s fall, and the necessity of Christ’s redemptive work. Human death—spiritual separation from God—entered through Adam’s sin. That is the death Christ came to conquer.
Animal death before the fall does not undermine that promise. In this view, human spiritual death and separation from God are the direct results of Adam’s sin, while nonhuman death reflects the normal functioning of the natural world God made.
How Does Old-Earth Creationism Compare to Other Creation Views?
Other Creation Perspectives
The table below compares four widely discussed creation views. Two points of detail worth noting: Evolutionary creationism is sometimes called theistic evolution, but there is a distinction. Unlike some theistic evolutionists, evolutionary creationists hold that God directly intervened in miraculous ways to shape the universe, solar system, and Earth so it could support a great abundance and diversity of life.
Where evolutionary creationism parts company with old-earth creationism is on the question of life’s development: evolutionary creationism accepts macroevolution and common descent, while old-earth creationism holds that God directly created new forms of life at key points in history.
Intelligent design (ID) is not a creation model based on a particular reading of Genesis but an apologetic framework. It argues that features of the natural world—such as biological complexity and the fine-tuning of the universe—are best explained by an intelligent cause. Because ID does not specify the age of the earth or identify the Designer in biblical terms, Christians, Jews, Muslims, or even nontheists may affirm it. Many old-earth creationists draw on ID arguments as scientific support for the claim that life shows marks of purposeful design.
Popular Creation Views
| View | When Was Earth Created? | Age of the Earth | Key Distinctives |
|---|---|---|---|
| Young-Earth Creationism (YEC) | Within the last 6,000–10,000 years | Thousands of years | Six 24-hour days of creation; rejects the scientific conclusion that the earth is billions of years old; argues that fallen human reasoning can distort interpretations of nature’s past; affirms a literal Adam and Eve from whom all humans are descended; rejects macroevolution. |
| Old-Earth Creationism (OEC) | Billions of years ago, over vast “day-age” periods | 4.6 billion years (Earth), 13.8 billion years (universe) | Interprets the “days” of Genesis as long, consecutive epochs; accepts the scientific evidence for the age of the Earth and universe; affirms historical Adam and Eve from whom all humans are descended; rejects human evolution from nonhuman ancestors; upholds dual revelation. |
| Evolutionary Creationism(EC) | Billions of years ago, through evolutionary processes | 4.6 billion years (Earth), 13.8 billion years (universe) | God used evolutionary processes to bring about life; often reads Genesis 1–3 as primarily figurative, not strictly historical; typically does not affirm a uniquely created first pair as the sole human ancestors; accepts macroevolution. |
| Intelligent Design(ID) | Varies depending on the interpreter | Varies | Not tied to a specific timeline; emphasizes features of nature—especially biological complexity and fine-tuning—as evidence of design; skeptical of unguided processes; includes a range of religious and scientific perspectives. |
What Unites Us in the Creation Conversation
Christians hold different views on creation, but old-earth creationism offers something distinctive: a reading of Genesis that takes the Hebrew text seriously and seeks alignment with what God has revealed through the natural world. It affirms that “in the beginning, God created the heavens and the earth” (Genesis 1:1) and that “through him all things were made; without him nothing was made that has been made” (John 1:3)—while also embracing the full weight of the evidence he left for us to find.
Thoughtful Christians reach different conclusions on these questions, and the conversation is worth having. But if the same God who authored Scripture also made the heavens and the earth, we should expect his two works to tell a consistent story. Old-earth creationism says they do.
Explore our library of resources where Scripture and science meet. Download our free Genesis 1 ebook, written by Dr. Hugh Ross. For a deeper dive, see A Matter of Days; Navigating Genesis; Noah’s Flood Revisited; Rescuing Inerrancy.
