 The Simpsons uses a floating timeline in which the characters do not physically age , and as such the show is assumed to be set in the current year . In several episodes , events have been linked to specific times , though sometimes this timeline has been contradicted in subsequent episodes . Maggie is the youngest child of Marge and Homer , and sister to Bart and Lisa . When Marge became pregnant with Bart , she and Homer got married at a chapel in Las Vegas . To support his impending family , Homer all but demanded a job at the Springfield Nuclear Power Plant , impressing its owner , Mr Burns , with his aggressive <unk> . When Marge became pregnant with Lisa , two years later , she and Homer bought their first house . Another six years later , Homer felt financially secure enough to finally quit his job at the Power Plant and take his dream job at Barney 's <unk> . However , Marge became pregnant with Maggie , so Homer , once again unable to support his family , was forced to <unk> for his old job . By the time Maggie was born , Homer had shown great signs of distress , but he managed to find motivation in the form of his newborn baby girl . 
