Remember, these are symbolic; they do not become sacraments. That means that the bread and wine do not actually become the flesh and blood of Christ, but are the symbols of the flesh and blood. 

The Lord’s Supper – (or communion) is taken all during the Christian life. I Cor. 11:23-28 explains this. "That as often as you do this, you are remembering his death until He comes (for the Church in the rapture)."  

(1) The Lord’s Supper was originated by Christ himself. 

(2) To partake of the Lord’s Supper is a command, “This do”. 

(3) The purpose of the ordinance is to keep us in remembrance of Christ’s death (looking back), until His coming  (looking forward) to His return. This also reminds us of where we come from, and where we are going, thus helping us to live holy lives. 

(4) Every Christian is to participate in the taking of the Lord’s Supper. It is the Lord’s table, not any particular church’s. Some churches have a closed communion; and that is not scriptural as it should be open to all Christians. 

(5) It is very important that each Christian examine his own heart and life before taking communion, and be careful that there is no unconfessed sin in his life. 

I Cor.  11:27-31 – “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. But let a man examine himself, and so let him eat of that bread, and drink of that cup. For he that eateth and drinketh unworthily eateth and drinketh damnation to himself, not discerning the Lord’s body. For this cause many are weak and sickly among you, and many sleep, for if we should judge ourselves, we should not be judged.” 

This is a very important ordinance. How often it is observed is up to each church – some churches do it each Lord’s day some once a month, and others less often. There is no set rule. But “as of as ye do it,” you remember the Lord’s death until He returns.