For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it. (Exodus 20:11)
I have heard it said that the universe is something like 13.8 Billion years old and that the earth is around 4.4 Billion years old. How they—those that make such claims—arrive at such astronomical numbers is beyond me. The earth does not have a manufacturer’s date stamp on it (or does it?). Those that make those claims are, for the most part, God-deniers along with some who, while not denying God, question the veracity of His Word.
The Bible says the universe, of which earth is a part, is young. Since God-deniers reject the notion of an all-powerful, all-knowing Creator God, they must invent some mechanism from which the entirety of the universe came. BANG! They invent a brilliant idea that all matter was compressed into an infinitesimally small “singularity” that got really hot and rapidly expanded into the universe that we know, which, by the way, continues to expand. You may recognize this hypothesis as the Big Bang theory, only it is not a very good hypothesis, much less a theory. Many secular scientists recognize the problem with this hypothesis and continue to look for ways to make it better. Some have given up on it altogether and opted for other hypotheses like the “string theory” (Don’t ask; I don’t have a clue what that means.), or the “multiverse theory.” The latter is quite clever. Since parallel universes are unobservable, they are free to speculate to their heart’s content on what happens in those unseen realms. Who will prove them wrong? At least they generally agree that the universe had a beginning.
“In the beginning God created the heaven and the earth” (Genesis 1:1). There you have it—the universe—in the opening sentence of the Bible—just ten short words (seven in the original Hebrew). In that short sentence you find time, space, and matter/energy—the components of the universe. The biblical creation record begins with Genesis 1:1 and concludes with Genesis 2:3. (The reader should keep in mind that chapter and verse divisions are not inspired text, and they do not appear in the original manuscripts.) The biblical creation account records that the entirety of creation took six 24-hour days with a cessation of creative activity on the seventh day. Now, there are compromisers out there calling themselves Bible-believing Christians that attempt to accommodate the God-deniers by inserting long ages anywhere they can in the biblical record. I do not have space here to present or argue against their positions. For now, allow me to simply say, they are wrong—so wrong! 
According to the Bible, the universe is only one day older than the planet earth. I need to point out that the universe in the beginning contained all the elements in a disorganized mess (it wasn’t a mess for God). “And the earth [i.e., matter/energy, the elements] was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters” (Genesis 1:2). The “planet” Earth was formed and organized on the second day of creation (Genesis 1:6-8). On the third day (Genesis 1:9-13), God caused the waters to separate from the land. It was not until the fourth day (Genesis 1:14-19) that God created the sun, moon, stars, galaxies, and all other celestial bodies.
Genesis 5 gives a detailed accounting of the years from the creation of Adam and Eve (Genesis 1:24-31) to the global flood of Noah which was about 1656 years. Creation to the time of Abraham was about 2000 years, from Abraham to Jesus another 2000 years, and from Jesus to present about 2000 years—6000 years total. There you have it! It is now time for the seventh millennium of rest (Revelation 20)!
Of course, God-deniers and Bible-doubters want scientific proof. Anyone serious enough and ambitious enough can go to the Institute for Creation Research website and take advantage of the search engine there where they will find all kinds of scientific research proving a young earth and a young universe. Here are just some of the proofs they will find:
- Magnetic fields on Uranus and Neptune that should not exist if the universe is billions of years old  
- Jupiter expends more energy than it receives from the sun. It should have run out of gas by now, if it is billions of years old
- Blue stars use up their fuel very rapidly. None should exist, if the universe is billions of years old
- Spiral galaxies would be unrecognizable, if they were billions of years old
- Carbon-14 in diamonds proves a young earth
- Soft tissue in dinosaur fossils should not last 65 million years 
- The improbability of evolution proves a young earth
- Scientists unwittingly confirm the Global Flood as recorded in Genesis 7, albeit attributing billions of years to it
The resources provided in the End Notes below should suffice for anyone with ears to hear and eyes to see; however, the God-denier cannot be convinced by evidence. The God-denier has a problem with God. That is a spiritual problem, not an intellectual problem. “But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned” (1 Corinthians 2:14). The universe and the earth are young, just like the Bible says.
 “A Day Is A Day” https://erniecarrasco.com/2015/10/25/a-day-is-a-day/
 “Age of the Earth” https://erniecarrasco.com/2014/02/23/age-of-the-earth/
 “How Young Is the Earth? Applying Simple Math to Data Provided in Genesis” http://www.icr.org/article/how-young-earth-applying-simple-math-data-provided
 “The Creation of Cosmic Magnetic Fields” http://www.icr.org/article/cosmic-magnetic-fields-creation
 “Blue Stars Confirm Recent Creation” http://www.icr.org/article/blue-stars-confirm-recent-creation
 “Diamonds May Be a Creationist’s Best Friend” http://www.icr.org/article/diamonds-may-be-creationists-best-friend
 “The Mathematical Impossibility Of Evolution” http://www.icr.org/article/mathematical-impossibility-evolution
 “Early Earth was covered in a global ocean and had no mountains” New Scientist, May 8, 2017, https://www.newscientist.com/article/2130266-early-earth-was-covered-in-a-global-ocean-and-had-no-mountains/, accessed May 20, 2017.