Increasingly, personal electronic devices display both calendars and clocks simultaneously.
The number (as on a clock dial or calendar) that marks the occurrence of a specified event as to hour or date is obtained by counting from a fiducial epoch—a central reference point.
The opposing view is that time does not refer to any kind of "container" that events and objects "move through", nor to any entity that "flows", but that it is instead part of a fundamental intellectual structure (together with space and number) within which humans sequence and compare events.
This second view, in the tradition of Gottfried Leibniz Time is one of the seven fundamental physical quantities in both the International System of Units and International System of Quantities.
and the clock, a physical mechanism that counts the passage of time.