Purchase Your One Year Subscription Token to SkyclockPlus.  It costs just a penny a day
Display Dual Clock Display - the 12 and 24 side-by-side
Display Manual Location - you may enter a latitude other than your own
Display UTC digital time aka Greenwich Mean Time
Display "Golden Hour" - the magical period immediately before sunset and after sunrise
Resize Hour Numbers
Display Astronomical Twilight
Display Clouds and Stars
Display Blue Ray day background
 
Skyclock, the web app, is a solar chronometer that tells time by sun, date, and location as no other clock on earth. The key visual aid is twilight, when the sun's rays are close to the earth. 
 
In the history of time-telling (chronology), no other clock provided a visual day/night and twilight representation.
 
Daylight and darkness everywhere are intersected twice daily by alternating periods of twilight. Skyclock precisely measures and graphically displays lengths of twilight, daylight and darkness periods, which in most populated areas changes daily. For instance, in March and September the length of day may shorten or lengthen by two minutes. 
 
Here's an example of a twilight period. In the Eastern time zone the time may be 7:30 a.m., and in New York City sunrise begins by the sky brightening (morning twilight). But in a straight line 482 miles west, in Detroit, night prevails and it's still 7:30.  In a few minutes New York may be in daylight, while in Detroit the early stages of twilight will begin. Yet it's still the same hour in both cities. 
 
Skyclock 2.2.3 on the web, free, visually displays the difference.