“Marvel not at this: for the hour cometh, in which all that are in the tombs shall hear his voice, and shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of judgment.” (John 5:28–29)
The Greek word here translated "hour" is ora (word number 5610 in Strong's Greek Dictionary.) Although the basic meaning of this word is the twelveth part of a day (or the 24th part of a revolution of the earth on its axis), it is also used in scripture in various other ways, including:
23 But the hour is coming, and now is, when the true worshipers will worship the Father in spirit and truth; for the Father is seeking such to worship Him.
John 4:23
25 Most assuredly, I say to you, the hour is coming, and now is, when the dead will hear the voice of the Son of God; and those who hear will live.
John 5:25
35 He was the burning and shining lamp, and you were willing for a time to rejoice in his light.
John 5:35
2 They will put you out of the synagogues; yes, the time is coming that whoever kills you will think that he offers God service.
John 16:2
11 And
do this, knowing the time, that now
it is high time to awake out of sleep; for now our salvation
is nearer than when we
first believed.
Romans 13:11
8 For even if I made you sorry with my letter, I do not regret it; though I did regret it. For I perceive that the same epistle made you sorry, though only for a while.
2 Corinthians 7:8
17 But we, brethren, having been taken away from you for a short time in presence, not in heart, endeavored more eagerly to see your face with great desire.
1 Thessalonians 2:17
These re only a few of the places where this Greek word was used by the Hly Spirit to refer to an indistinct period of time.
The same is true of your argument that the two resurrections both take place at the last day. For the Greek word hmera, which literally translates as "day," (word 2250 in Strong's Greek Dctionary), does not only mean a single period in which thesun reashes the surface of the ground, nor does it only mean a single revolution of the earth on its axis. It is also used of an indistinct period of time in the following scriptures:
20 At that day you will know that I
am in My Father, and you in Me, and I in you.
John 14:20
23 And in that day you will ask Me nothing. Most assuredly, I say to you, whatever you ask the Father in My name He will give you.
John 16:23
26 In that day you will ask in My name, and I do not say to you that I shall pray the Father for you;
John 16:26
17
'And it shall come to pass in the last days, says God, That I will pour out of My Spirit on all flesh; Your sons and your daughters shall prophesy, Your young men shall see visions, Your old men shall dream dreams. Acts 2:17
24 Yes, and all the prophets, from Samuel and those who follow, as many as have spoken, have also foretold these days.
Acts 3:24
1 Now in those days, when
the number of the disciples was multiplying, there arose a complaint against the Hebrews by the Hellenists, because their widows were neglected in the daily distribution.
Acts 6:1
1 Now Saul was consenting to his death. At that time a great persecution arose against the church which was at Jerusalem; and they were all scattered throughout the regions of Judea and Samaria, except the apostles.
Acts 8:1
18 So Paul still remained a good while. Then he took leave of the brethren and sailed for Syria, and Priscilla and Aquila
were with him. He had
his hair cut off at Cenchrea, for he had taken a vow.
Acts 18:18
36 As it is written:
"For Your sake we are killed all day long; We are accounted as sheep for the slaughter." Romans 8:36
21 But to Israel he says:
"All day long I have stretched out My hands To a disobedient and contrary people." Romans 10:21
2 For He says:
"In an acceptable time I have heard you, And in the day of salvation I have helped you." Behold, now
is the accepted time; behold, now
is the day of salvation.
2 Corinthians 6:2
So both of your arguments on this point are groundless