Abstract: A schedule management apparatus includes a term data input section for inputting a term data by designating a start day and an end day, a schedule input section for inputting a schedule corresponding to the term data inputted by the term data input section, a memory for storing the term data and the schedule in correspondence, a day designation section for designating a specific day, a retrieval section for retrieving, from the memory, a term data which includes the specific day designated by the day designation section, a schedule display section for displaying at least the start day and the end day of the term data retrieved by the retrieval section.

Abstract: In the data control apparatus for managing data including the time information such as date, when the research period is set as the data retrieval condition, the data including the time information of the retrieval period is selected. The dates of the start point and end point of the research period in the data retrieval in the year unit are always the same, and the days of the start point and end point of the research period in the month unit are determined depending on each month. That is, in the data control apparatus of the invention, when only the year is entered when setting the research period, "January 1" and "December 31" are automatically set as the dates of the start point and end point. Or when the month and year are entered, the "first" and the "end day of that month" are automatically set as the days of the start point and end point. Therefore, the load of the operator for setting the research period may be alleviated.