A display device which displays a list of data, including a date and time acquisition section which acquires the date and time associated with a piece of the data. The display device further includes: a three-dimensional display section which displays a three-dimensional space having axes respectively indicating the three kinds of time units, and arranges an icon indicating the piece of the data at a position corresponding to the date and time; and a two-dimensional display section which displays a two-dimensional space having axes indicating two kinds of time units including a first unit, which is the longest, among the three kinds of time units, and arranges a mark indicating that the data with which the date and time is associated exists at the position of the date and time acquired by the date and time acquisition section.