This is what the Lord has to say about the last day: And this is the Father's will which hath sent Me, that of all which He hath given me I should lose nothing but should raise it up again at the last day. And this is the will of Him that sent me, that everyone which sees the Son, and believeth on Him, may have everlasting life: and I will raise him up at the last day. No man can come to Me, except the Father Which hath sent Me draw him: and I will raise him up at the last day. Whoso eats My flesh, and drinks My blood, hath eternal life; and I will raise him up at the last day. – John 6:39, 40, 44, 54. This last day will be as long as the first day!

Does the Bible teach that there will be one last day for this world? Yes, and the Bible tells us what events will happen on that last Day.
1. The visible return of Jesus – 2 Thess 1:5-10; Rev 1:7
2. The rapture of the saints – 1 Thess 4:13-18
3. The resurrection of all the dead – Acts 24;15, 1Cor 15:35-58.
4. The judgement of all mankind – 2 Tim 4:1; Rom 14:10
5. The destruction of Satan – Matt 25:41, 46; Rev 20:7-10
6. The Church gathering as New Jerusalem – John 14:2, 3; Rev 21:1-7
7. The burning of the planet earth – 2 Pet 3:10-13; Heb 12: 27-29