The time when something happens.
Need; requirement, necessity.
Something which causes something else; a cause.
A reason or excuse; a motive; a persuasion.
A special event or function.
A particular happening; an instance or time when something occurred.
An occurrence or state of affairs which causes some event or reaction; a motive or reason.
A favorable opportunity; a convenient or timely chance.
To cause; to produce; to induce
One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).
The rotational period of Earth; the time in which Earth rotates around its axis 360 degrees.