The Catholic sacrament of Confirmation is a permanent "seal" on your soul. There is nothing to "last". As baptism makes you forever a child of God, and a Christian, which is an indelible change so does Confirmation seal you with the Holy Spirit and makes you an adult believer. Just as baptism, when you are an adult, does not change how you act, you have to do that, the baptism just makes it possible. Similarily with confirmation, you are sealed with the Holy Spirit and that is a complete difference in your soul from the way that you were before Confirmation, but whether and how long you act on that is up to you.
No, you would need to be confirmed to be a sponsor.
Yes, to be a sponsor of Baptism or Confirmation you need to be Catholic, Confirmed, and at least age 16. If you are Catholic but not Confirmed you can be a Christian witness godfather as long as another sponsor godmother is Catholic and Confirmed.
When you are confirmed in your faith
In the sacrament of Confirmation, the Holy Ghost is given to the person confirmed.
Confirmation is the agreement to be a soldier of Christ.
When you are confirmed in your faith
First a president nominates a candidate for supreme court justice and then the senate holds hearings and decide whether or not to confirm the nominee. How quickly a candidate gets confirmed depends on how lengthy the confirmation hearings last and how long it takes to bring the notion to a vote. Once a candidate is confirmed, they are soon sworn in and are then supreme court justices.
A Confirmation sponsor is a confirmed Catholic in good standing who mentors the Confiramation candidate before he or she is confirmed. Traditionally the Confirmation sponsor is a Godparent (connecting Baptism to Confirmation), but does not have to be.
As a faithful member of the Church.
Confirmation Confirmed
No there was no need what so ever for Jesus to be confirmed.
Confirmation may be completed anytime after baptism, but it is a grave sin to put it off; so, if you are not already confirmed, no matter how old you are, you should set about being confirmed.