Date Time
The 'Date Time' tab-page controls all the time-related functions of the program. It is divided into two panels:
1/ 'Set Date and Time for the Program Operation' - this panel is used to set the time-values that the program uses. Normally you would use the first option: 'Now - Start at Current Value, Advance as Normal'. The clocks are all set to the current time, and advance as your computer clocks do. The second option: 'Custom Time - Stay Fixed at Value, No Advancing' is used to show the map and its clocks fixed at a static value that is obtained from the 'Custom Time' date-time picker. The third option: 'Custom Time - Start at Custom Value, Advance as Normal' lets you set a starting date and time that is obtained from the 'Custom Time' date-time picker, and then advances the time as your computer clocks do. The fourth option: 'Time Span - Loop Between From and To Limits' lets you set a starting date and time that is obtained from the 'Time Span From' date-time picker, and then advances the time as your computer clocks do until the date/time in the 'Time Span To' date-time picker is reached. It then resets to the date/time in the 'Time Span From' date-time picker, and then advances as before.
2/ 'Configure the Time Bar' - The 'Time Bar' is that section of the main program window that is above the map. It contains clocks for each 15 degree wide major time zone. The clocks can be analog or digital. You can also hide the Time Bar completely. The labels for each clock can also be varied from the following options:
a/ Arbitrary Name - a name of an important place or major city in that Time Zone. It does not mean that the clock then shows the current local time in the named place.
b/ Offset Value - shows the offset, in hours, from UTC (Coordinated Universal Time, aka Greenwich Mean Time).
c & d/ Military Letter Code/Names - Military time zones are defined in the ACP 121(I) standard, which is used by the armed forces for Australia, Canada, New Zealand, the United Kingdom, the United States, and many other nations. The names are identical to the NATO phonetic alphabet. Going east from the prime meridian at Greenwich, letters "Alfa" to "Mike" (skipping "J", see below) represent the 12 time zones with positive UTC offsets until reaching the international Date Line. Going west from Greenwich, letters "November" to "Yankee" represent zones with negative offsets. The letters are typically used in conjunction with military time. For example, 6:00 a.m. in zone UTC-5 is written "0600R" and spoken "zero six hundred Romeo". See: https://en.wikipedia.org/wiki/List_of_military_time_zones
e/ No labels. If you don't need labels, this is a way to make the map a little larger. The map's height is always set to 180 degrees of latitude.