Custody refers to the legal right and responsibility to make decisions about a child's care, upbringing, and welfare. When parents separate or divorce, custody arrangements determine where children live and who makes major decisions about their education, healthcare, religion, and activities. Canadian family law recognizes different custody types: sole custody (one parent has decision-making authority), joint custody (both parents share major decisions), and shared custody (children spend significant time with both parents). The courts prioritize the child's best interests when determining custody arrangements. Custody is distinct from access or parenting time, which refers to the schedule of when children are with each parent. Family law varies somewhat between provinces, though principles are similar across Canada.