The Bible Does not teach that Sunday or Saturday is the Lord's Day, but that this Day is yet to Come

I will take this argument against my opponent and stand that the Bible DOES teach there is a Sabbath on the seventh day (Saturday), and that the Lord's Day To Come (called "The Day of The Lord/Day Of Judgement") my opponent refers to is something entirely different. Now in regards to the Sabbath, ( Exodus 31:15 "Six days shall work be done, but the seventh day is a Sabbath of solemn rest, holy to the LORD. Whoever does any work on the Sabbath day shall be put to death." Leviticus 23:3 "Six days shall work be done, but on the seventh day is a Sabbath of solemn rest, a holy convocation. You shall do no work. It is a Sabbath to the LORD in all your dwelling places." Exodus 20:8 "Remember the Sabbath day, to keep it holy." Hebrews 4:9 "So then, there remains a Sabbath rest for the people of God" Deuteronomy 5:12 "Observe the Sabbath day, to keep it holy, as the LORD your God commanded you." -Bible, English Standard Version. The Sabbath is established twice in the Bible first in Exodus 31:15 then reworded once again in Leviticus 23:3. It is very cleary established as the seventh day, meaning Saturday, and holy to the Lord. Holy meaning set apart, "specially recognized as or declared sacred by religious use or authority; consecrated" - Dictionary.com. The Day was set apart and consecrated by the Lord, leading it to be called "The Lord's Day". The Sabbath is not directly called "The Lord's Day" in the Bible, at least not in the ESV (English Standard Version). It is, however, often called "The Lord's Day" by the church, sharing the same name as "The Day of the Lord", or "The Day Of Judgment". Now the "Day of The Lord" or "Day Of Judgment" speaks prophtically of the day the Lord Jesus Christ will come again to judge the living and the dead. I have cross referenced the NIV (New International Version) of the Bible and the term "The Lord's Day" again never appears once. By experience in several churches (Pentacostal, Charismatic, Reformed, Baptist) over the years, The term "The Lord's Day" has always been used to refer to either "The Sabbath" or "The Lord's Coming Day of Judgement/ Day of the Lord". Such instances of this day are recorded like this; Isaiah 13:6 "Wail, for the day of the LORD is near; it will come like destruction from the Almighty." The great day of the LORD is near— near and coming quickly. Zephaniah 1:14 "The cry on the day of the LORD is bitter; the Mighty Warrior shouts his battle cry." Joel 1:15 "Alas for that day! For the day of the LORD is near; it will come like destruction from the Almighty." Ezekiel 30:3 "For the day is near, the day of the LORD is near— a day of clouds, a time of doom for the nations." 2 Peter 3:10 "But the day of the Lord will come like a thief. The heavens will disappear with a roar; the elements will be destroyed by fire, and the earth and everything done in it will be laid bare." This "Day of the the Lord" is the same day as "The Day of Judgment" mentioned later on the The New Testament. 2 Peter 2:9 "if this is so, then the Lord knows how to rescue the godly from trials and to hold the unrighteous for punishment on the day of judgment." Matthew 12:36 "But I tell you that everyone will have to give account on the day of judgment for every empty word they have spoken." 2 Peter 3:7 " By the same word the present heavens and earth are reserved for fire, being kept for the day of judgment and destruction of the ungodly." Romans 2:5 " But because of your stubbornness and your unrepentant heart, you are storing up wrath against yourself for the day of God’s wrath, when his righteous judgment will be revealed." -Bible, NIV New International Version. Analyzing these two names "Day of the Lord" and "Day of Judgement", I believe I have provided insurmountable truth that both these terms crossreferenced in the Bible are in fact the same day. Both speak of God's second coming and destruction/ wrath/ punishment against the ungodly. In conclusion, neither "days" have been written in the Bible specifically as "The Lord's Day" although they are both referred to as such in context of Scripture. Therefore, this negates my oponent's claim that there is a "Lord's Day" in The Bible, as well as providing the true meaning of both days, "The Sabbath" and "Day yet to Come" in which my opponent was refering to.