HELP: clock
user timezone detected: "America/Chicago"

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This form controls the clock display. The first thing on it, is a big selection box where you can select your timezone so the clock will show the correct time for your area. If your city is not listed, select one that has the same timezone as yours. Look here for a complete list of available timezone settings, timezones in your country, or timezones in your area. Names shown in green are within the currently selected country. Note that some displays will still be wrong unless your computer's own clock is set correctly.

"description of location": Here, you can optionally add a short (maximum 30 characters) description of your location. This does nothing but is visible along with the clock display. Some HTML features can be used.

"show sunrise & sunset": Check here if you want the page to display today's sunrise and sunset times. Note that calculating these depends on the "latitude" and "longitude" settings below.

"latitude": Enter the latitude (angle north or south of the equator) for your location. The acceptable range is -90 (south pole) to 90 (north pole). 0 is at the equator. Note that if you change the timezone, 'latitude' and 'longitude' are set to approximate values for that timezone. Custom values are kept as long as you do not change the timezone. Changing "description of location" is not considered changing timezone.

"longitude": Enter the longitude (angle east or west of the prime meridian) for your location. The acceptable range is -180 (far west) to 180 (far east).

"reset lat & long": check this box to reset latitude and longitude to their defaults (this is present only if lat & long have been changed).

For help in determining latitude and longitude for a certain point, look here.

"twilight": You can select which twilight angles you want: civil, nautical, or astronomical.

"hide clock": Check here if you do NOT want to see the clock display. Note that the clock will still work properly.

"24-hour clock": Check here if you want the clock display to show 24-hour time (hour= 0 to 23, no AM/PM). This affects the clock display, event setting, and the "custom time" feature. (If you do not have this feature, but would like to try it click here).

"include seconds": Check here if you want the clock display to include seconds. This affects all displays including the big clock, and all data entry forms. Note that some systems may be too slow to show seconds smootly.

"date format:" Select the way you would like to see dates displayed. For today (Monday August 21, 2017):

year is 2017
month# is 8
month is Aug
MONTH is August
day is 21
weekday is Mon
WEEKDAY is Monday
ISO week date is 2017-W34-1
day of year is 232

Select 'other' here and you can enter any string in the box to the right. You can use any characters recognized by the PHP 'DATE' function. The "24-hour clock" and "include seconds" options still control data entry and the big clock.

"display: " select how you want the time displayed with the date. If you don't understand this, it should be OK to leave it at the default.
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