In the beginning God created the heavens and the earth.

Young-earth creationists believe that the creation days of Genesis were six literal (24-hour) days, which occurred 6,000–12,000 years ago. They believe that about 2,300–3,300 years before Christ, the surface of the earth was radically rearranged by Noah’s Flood. All land animals and birds not in Noah’s Ark (along with many sea creatures) perished, many of which were subsequently buried in the Flood sediments. Therefore, creationists believe that the global, catastrophic Flood was responsible for most (but not all) of the rock layers and fossils (i.e., some rock layers and possibly some fossils were deposited before the Flood, while other layers and fossils were produced in postdiluvian localized catastrophic sedimentation events or processes).

When we start our thinking with God’s Word, we see that the world is about 6,000 years old. When we rely on man’s fallible (and often demonstrably false) dating methods, we can get a confusing range of ages from a few thousand to billions of years, though the vast majority of methods do not give dates even close to billions.
Cultures around the world give an age of the earth that confirms what the Bible teaches. Radiometric dates, on the other hand, have been shown to be wildly in error.

Thus says the Lord:
Isaiah 66:1-2 King James Version (KJV)
66 Thus saith the Lord, The heaven is my throne, and the earth is my footstool: where is the house that ye build unto me? and where is the place of my rest?
2 For all those things hath mine hand made, and all those things have been, saith the Lord: but to this man will I look, even to him that is poor and of a contrite spirit, and trembleth at my word.

Answers in Genesis[answersingenesis.org]