The time of birth is bitter sweet, full of pain, but also full of Joy. Each birthday is a rememberance of the joy and pain of that day, and all the grace and goodness of God shown in a person's life since that time.
ASV | Matthew 18:1 - 18:3
1In that hour came the disciples unto Jesus, saying, Who then is greatest in the kingdom of heaven?
2And he called to him a little child, and set him in the midst of them,
3and said, Verily I say unto you, Except ye turn, and become as little children, ye shall in no wise enter into the kingdom of heaven.
The birthday of little children is special because they remind us of what a right relationship with God really looks like. The faith of little children is an example to all adults aspiring to be children of God.
Their birthday should be celebrated as a reminder of how much of a blessing they are to us.
ASV | Proverbs 9:11
11For by me thy days shall be multiplied, And the years of thy life shall be increased.
To be kept by God, and have his face shine upon us is what we're born for. To have the joy and the peace of God is what our soul yearns for. This blessing belongs to all who love the Lord, and to all who receive His favor. And may this blessing be our birthday wish to you!
ASV | Psalms 139:14
14I will give thanks unto thee; for I am fearfully and wonderfully made: Wonderful are thy works; And that my soul knoweth right well.