Many people understand that they are "at will" employees in the State of California with some exceptions, but many do not understand what the term "At Will" means.
California Labor Code 2922 states the following;
An employment, having no specified term, may be terminated at the will of either party on notice to the other. Employment for a specified term means an employment for a period greater than one month.
Therefore, in most "At Will" scenario's the employer and the employee have the absolute right to terminate the employment relationship at anytime. Most lawyers will tell prospective clients that " You can be fired for any reason at any time as long as the reason for termination is not an illegal reason.." As long as your employer does not have an illegal intent when terminating an employee the termination can be done at any time and for any reason.