Addition $(+)$: combines the seconds, minutes, hours, and days of two clocks and returns a third clock that correctly displays the combined values adhering to the note above.

Subtraction $(-)$: takes seconds, minutes, hours, and days from one clock away from another and returns a third clock with the resulting seconds, minutes, hours, and days. Note that clocks may display negative time.

Negation $(-)$: flips the sign of all the private data members on a clock.

Equals $(==)$: compares two clocks and returns true if the clocks have the same seconds, minutes, hours, and days. It returns false otherwise.

Less Than $(<)$: compares two clocks and returns true if the first clock has less time on it$.$ It returns false otherwise.

Greater Than $(>)$: compares two clocks and returns true if the first clock has more time on it$.$ It returns false otherwise.

Insertion $($