TABLE 1.

Proposed organization of the global 24-h program.

UTC (hours)	0–2	2–4	8–10	10–12	16–18	18–20
Tokyo (+9) and Asia-Pacific	Early AM	Late AM	Early PM	Late PM
Los Angeles (−7) and Americas	Early PM	Late PM			Early AM	Late AM
London (+1) and Europe/Africa			Early AM	Late AM	Early PM	Late PM

The times in UTC in the top row are convenient if reference hubs are located in the time zones of London, Tokyo, and Los Angeles in the summer: for example, UTC8 is 9:00 local time in London. The program at each reference hub runs 9–21 local time (break: 13–17) and comprises four slots: Early AM (9–11), Late AM (11–13), Early PM (17–19), and Late PM (19–21). At additional hubs, timing is either the same (9–21) or ± 1–2 h (7–19, 8–20, 10–22, or 11–23). The entire plan may be shifted forwards or backwards by a constant number of hours without changing the basic structure.