If you do not believe his six day creation, you do not believe, so do not call yourself a believer.
What a ridiculous and erroneous claim. Show me where it says six 24 hour days! You cannot! Even within the first verses, we see that there is day and night, yet those things come to pass later, when the heavens are filled for that very purpose.
What belief do you eschew? That the earth is 6000 years old, is your presumption, but where is your proof? You are taking the words from another, and not applying a proper exegesis to those Words I noted. I have no way of determining the date and time of creation. I do believe it happened.
From: Literal translations of the Hebrew word, yom, like our English word "day," can refer to a 24 hour day, sunrise to sunset (12 hours), or a long, unspecified period of time (as in "the day of the dinosaurs"). The Hebrew word ereb, translated evening also means "sunset," "night" or "ending of the day." The Hebrew word boqer, translated morning, also means "sunrise," "coming of light," "beginning of the day," or "dawning," with possible metaphoric usage (1). Our English expression: "The dawning of an age" serves to illustrate this point. This expression in Hebrew could use the word, boqer, for dawning, which, in Genesis 1, is often translated morning. (www.godandscience.org)
Hebrews 11: 1 Now faith is the assurance of things hoped for, the conviction of things not seen.2 For by it the men of old gained approval.
3 By faith we understand that the worlds were prepared by the word of God, so that what is seen was not made out of things which are visible
...and finally: 1 Corinthians 1: 20Where is the wise man? Where is the scribe? Where is the debater of this age? Has not God made foolish the wisdom of the world? 21 For since in the wisdom of God the world through its wisdom did not come to know God, God was well-pleased through the foolishness of the message preached to save those who believe.22 For indeed Jews ask for signs and Greeks search for wisdom;23but we preach Christ crucified, to Jews a stumbling block and to Gentiles foolishness,24 but to those who are the called, both Jews and Greeks, Christ the power of God and the wisdom of God.25 Because the foolishness of God is wiser than men, and the weakness of God is stronger than men.
26 For consider your calling, brethren, that there were not many wise according to the flesh, not many mighty, not many noble;27 but God has chosen the foolish things of the world to shame the wise, and God has chosen the weak things of the world to shame the things which are strong,28 and the base things of the world and the despised God has chosen, the things that are not, so that He may nullify the things that are,29 so that no man may boast before God.30 But by His doing you are in Christ Jesus, who became to us wisdom from God, and righteousness and sanctification, and redemption,31 so that, just as it is written, “LET HIM WHO BOASTS, BOAST IN THE LORD.”