Q: Is it illegal to leave my 13 year old and 17 year old home over night

A: In California, there is no specific law that dictates a minimum age at which a child can be left home alone overnight. However, leaving a child unsupervised for an extended period may fall under child neglect laws if the child's welfare is compromised.

According to the California Welfare and Institutions Code Section 300, child neglect is defined as a situation where a child has suffered, or is at substantial risk of suffering, serious physical harm or illness as a result of the failure or inability of their parent or guardian to adequately supervise or protect the child.

In your case, a 17-year-old is generally considered mature enough to be left alone overnight and to supervise a 13-year-old sibling. However, it is important to ensure that both children are mature enough to handle potential emergencies and have access to resources and support if needed.

Factors to consider include:

1. The children's maturity and ability to handle responsibilities

2. The safety of the home environment

3. The availability of emergency contacts and resources

4. The length of time the children will be unsupervised

If you believe your children are capable of staying home alone overnight and their needs are met, it is unlikely to be considered illegal. However, if you have concerns, it is best to consult with a local family law attorney or contact the California Department of Social Services for guidance.