That is something the parents have to agree on. They can agree to change the visitations if they come to an understanding. The custodial parent has counted on the child being in the non-custodial parent's care and may have made plans.
On the other hand, many non-custodial parents do not adhere to the visitation schedule. If that is the case and you are the custodial parent there is little you can do. You cannot make them pick the child up for a visit if the parent isn't interested nor do you have much control if they return the child early unless they drop the child off and you're not home or drop the child with someone else because you're not home. If they do that or fail to bring the child home at the appointed time repeatedly you can file a motion for contempt with the court but the issue needs to be serious to take that step.
If the noncustodial parent tries to keep the child, the custodial parent can get the noncustodial parent charged with kidnapping and contempt of court both can be jail time for the noncustodial.
can noncustodial parent parent claim 1 child if divorce with 2 kids
no
if the child doesn't want to see the noncustodial parent he doesn't have too. don't force him to do it =)
Generally, no.
no
The one who would be responsible for the child during that time which would be the non custodial parent.
for what?
When the child is 18.
Yes
yes
NO!