Context: Temporal measurement, chronometry, takes two distinct period forms: the calendar, a mathematical tool for organizing intervals of time, and the clock, a physical mechanism that counts the passage of time. In day-to-day life, the clock is consulted for periods less than a day whereas the calendar is consulted for periods longer than a day. 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.

Question: What is a mathematical tool used for organizing intervals of time?
Answer: the calendar

Question: What is a physical tool that tracks the passage of time?
Answer: the clock

Question: Which tool is used in day to day life?
Answer: the clock

Question: Which tool is used in periods longer than a day?
Answer: the calendar

Question: How is the number that marks the occurrence of an event obtained?
Answer: by counting from a fiducial epoch—a central reference point

Question: For how long does chronometry usually display a reference point?
Answer: Unanswerable

Question: What do fiducial epochs display at the same time?
Answer: Unanswerable

Question: What physical mechanism is used to count periods longer than a day?
Answer: Unanswerable

Question: What organizational mathmatical tool is used for a time period of less than a day?
Answer: Unanswerable

Question: What do people usually carry with them at all times?
Answer: Unanswerable

Question: What is a mathematical tool used for organizing intervals on clocks? 
Answer: Unanswerable

Question: What is a physical tool that tracks the passage of points?
Answer: Unanswerable

Question: Which tool is used in periods longer than an interval?
Answer: Unanswerable

Question: How is the number that marks the occurrence of an interval obtained?
Answer: Unanswerable

Question: What takes three distinct period forms?
Answer: Unanswerable