The vehicular baby reminder system is a kit. The vehicular baby reminder system is a safety device. The vehicular baby reminder system simultaneously attaches to an infant or pet and a domestic article such that the when the custodian moves with the domestic article, the custodian will be reminded of their custodial responsibility regarding the infant. The vehicular baby reminder system comprises a tether, a plurality of loops, one or more signs and a carton. The plurality of loops attach the infant and the domestic article to the tether. Each of the one or more signs is a placard that displays a sentiment reminding the custodian of their custodial responsibility regarding the infant. The carton is a container used to store the tether, the plurality of loops, and the one or more signs.