A data management apparatus capable of managing data stored in a storage unit includes a designation unit, setting, search, management units, and a first display control unit. The setting unit sets, based on predetermined date information included in designated data, information on a date to data to be stored and is other than the designated data. The search unit searches data, from among stored data, based on a date or period search condition. The management unit manages data to add, from among the searched data, data of known predetermined date information to a first result list and data to which the date information has been set to a second result list. The first display control unit causes a display such that each displayed data is accompanied with an identifier for distinguishing whether the data is searched out from among the data of the first or second result list.