Same as the passover celebrated once a year. Why would it matter to you? You aren't one who will be sitting on a throne.
Why don't you address the scriptures below for when they broke bread and held communion?
Acts 20:7 And upon the first day of the week, when the disciples came together to break bread, Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight.
Here it is specified when they had broken bread on the first day of the week, rather than specifying it was on the Passover.
Paul had to write a rebuke for how believers were coming to church each Sunday, that first day of the week.
1 Corinthians 11:20 When ye come together therefore into one place, this is not to eat the Lord's supper. 21 For in eating every one taketh before other his own supper: and one is hungry, and another is drunken. 22 What? have ye not houses to eat and to drink in? or despise ye the church of God, and shame them that have not? what shall I say to you? shall I praise you in this? I praise you not. 23 For I have received of the Lord that which also I delivered unto you, that the Lord Jesus the same night in which he was betrayed took bread: 24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me. 25 After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me. 26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come. 27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord. 28 But let a man examine himself, and so let him eat of that bread, and drink of that cup. 29 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.
30 For this cause many are weak and sickly among you, and many sleep. 31 For if we would judge ourselves, we should not be judged. 32 But when we are judged, we are chastened of the Lord, that we should not be condemned with the world.
33 Wherefore, my brethren, when ye come together to eat, tarry one for another. 34 And if any man hunger, let him eat at home; that ye come not together unto condemnation. And the rest will I set in order when I come.
So the last two verses sounds like they held communion every week for why Paul insisted that believers eat at home to avoid using the bread and the wine at church service for their meals so that everyone can have communion.
Even in 1 Corinthians 10:14-23 in the previous chapter, there is a rebuke about committing idolatry in believing Christ's Presence was in the bread and the wine and that communion was a term referring to symbolic, and yet still no insistence nor ordinance written that the communion had to be done on the Passover.
As far as who sits on the 12 thrones with Jesus is for God the Father to decide since it is on the Father who sits next to Jesus.
Matthew 19:27 Then answered Peter and said unto him, Behold, we have forsaken all, and followed thee; what shall we have therefore? 28 And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel.
Matthew 20:20 Then came to him the mother of Zebedees children with her sons, worshipping him, and desiring a certain thing of him. 21 And he said unto her, What wilt thou? She saith unto him, Grant that these my two sons may sit, the one on thy right hand, and the other on the left, in thy kingdom. 22 But Jesus answered and said, Ye know not what ye ask. Are ye able to drink of the cup that I shall drink of, and to be baptized with the baptism that I am baptized with? They say unto him, We are able. 23 And he saith unto them, Ye shall drink indeed of my cup, and be baptized with the baptism that I am baptized with: but to sit on my right hand, and on my left, is not mine to give, but it shall be given to them for whom it is prepared of my Father. 24 And when the ten heard it, they were moved with indignation against the two brethren. 25 But Jesus called them unto him, and said, Ye know that the princes of the Gentiles exercise dominion over them, and they that are great exercise authority upon them. 26 But it shall not be so among you: but whosoever will be great among you, let him be your minister; 27 And whosoever will be chief among you, let him be your servant: 28 Even as the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.
Since we are to see ourselves as servants rather than rulers, you should check that attitude at the door when entering Heaven.
Indeed, you should not be thinking higher of yourselves than you ought to think when entering the church per Romans 12:3 below.
Romans 12:1I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
3 For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith.
4 For as we have many members in one body, and all members have not the same office:
You are my brother in Christ and I have His love for you to correct you by His words so that you may be a better witness of Him as a shining light in these latter days where faith in Jesus Christ is hard to find.
So think about what you are serving; the Lord Jesus Christ in testifying of Him in seeking His glory or serving something else in His name by testifying of when communion can only be held as if to testify of your self righteousness in seeking your own glory by doing something no body else is doing which gives yourself the glory above everybody else, especially when neither Jesus nor any of His disciples taught plainly as such to hold communion ONLY on the Passover?
Romans 14:4 Who art thou that judgest another man's servant? to his own master he standeth or falleth. Yea, he shall be holden up: for God is able to make him stand. 5 One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded in his own mind. 6 He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks. 7 For none of us liveth to himself, and no man dieth to himself. 8 For whether we live, we live unto the Lord; and whether we die, we die unto the Lord: whether we live therefore, or die, we are the Lord's.