A time display device ("TDD")--equally adaptable to watches, clocks, computers, phones, and vehicles--indicates the current hour of the day by displaying a color that refers an observer to the disclosed color-to-hour matrix, thereby eliminating the traditional hour hand or digit altogether. Alternately adaptable to months, the system may be used with both mechanical and electronic displays. Various disclosed minute indicators provide minute indication by shape, complexity, company logo, air bubbles, or other novel methods. Environmental sensors allow switching between functions. TDD appearance is user-customizable via Internet. Birthstones, gemstones, and precious metals are alternately used as stand-alone time indicators.