HELP: clock
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user timezone detected: America/Chicago +

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This form controls the clock display.

Check "autodetect timezone" if you want the your browser to determine the timezone for you. If this is wrong, uncheck the box and select your timezone from the menu. 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. This menu is very long (currently 420 entries), so it may hide some of them (not on mobile browsers). Click the heading (in orange) to unhide them.

"disable native time in JavaScript (per-machine setting)": Try this setting if the time on the gray clock is incorrect. Note that this setting is per machine. This problem can happen when the DST rules are changed and your browser or OS hasn't been updated.

"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 entities 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).

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.

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

"reset lat & long to your preference": check this box to reset latitude and longitude to your preferences, as set below (this is present only if lat & long have been changed).

"set lat & long preference": check this to set your latitude and longitude preference, so it will be easy to return to them.

"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). Note that this is not available when you're using automatic timezone detection.

"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 (Wed, Apr 24, 2024 7:14 PM)

locale-specific date is Wed, Apr 24, 2024
locale-specific time is 7:14 PM
locale-specific datetime is Wed, Apr 24, 2024 7:14 PM
Note that the "display time" option will be ignored when using a locale-specific setting. The format used to display the date & time is browser-dependent. If you don't have JS, you'll get a substitute format.

year (Y) is 2024
month# (n) is 4
month (M) is Apr
MONTH (F) is April
day (j) is 24
weekday (D) is Wed
WEEKDAY (l) is Wednesday
ISO week date (o-\WW-N) is 2024-W17-3
day of year (z) is 114

ISO 8601 datetime (c) is 2024-04-24T19:14:57-05:00
RFC 2822 datetime (r) is Wed, 24 Apr 2024 19:14:57 -0500
Note that these 2 include time as well as date. You may want to set "display" to "time only" to avoid showing the time twice.

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. Note that The "24-hour clock" and "include seconds" options still control data entry and the big clock.
AM/PM (A) is PM
hour (12 hour, g) is 7
hour (24 hour, G) is 19
minute (i) is 14
second (s) is 57
timezone (e) is America/Chicago
timezone abbr (T) is CDT
for i18n: [[0]] - datetime (user selectable format) Wed, Apr 24, 2024 7:14 PM
for i18n: [[1]] - date (user selectable format) Wed, Apr 24, 2024
for i18n: [[2]] - time (user selectable format) 7:14 PM
for i18n: [[3]] - long month Apr
for i18n: [[4]] - short weekday Wed
for i18n: [[5]] - short date Wed Apr 24
for i18n: [[6]] - datetime (user selectable format without seconds), as UTC Thu, Apr 25, 2024 12:14 AM
for i18n: [[7]] - time (user selectable format without seconds), as UTC 12:14 AM

"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.

The date/time below will respond to changes that affect how time is displayed. Those settings are the ones in the gray box.

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