Clock position

A clock position is the relative direction of an object described using the analogy of a 12-hour clock to describe angles and directions. One imagines a clock face lying either upright or flat in front of oneself, and identifies the twelve hour markings with the directions in which they point.

Using this analogy, 12 o'clock means ahead or above, 3 o'clock means to the right, 6 o'clock means behind or below, and 9 o'clock means to the left. The other eight hours refer to directions that are not directly in line with the four cardinal directions.

In aviation, a clock position refers to a horizontal direction; it may be supplemented with the word high or low to describe the vertical direction which is pointed towards your feet. 6 o'clock high means behind and above the horizon, while 12 o'clock low means ahead and below the horizon.[1]

Horloĝo 001
The twelve clock positions

In media and culture

The 1949 movie Twelve O'Clock High takes its title from the system. In this case, the position would be ahead and above the horizon.

The phrase "on your six" refers to the system, six referring to the six o'clock or following position.

See also


  1. ^ Mariner, Liz (2007), Cleared for Takeoff: English for Pilots, Book 1, AE Link Publications, pp. 89–90, ISBN 978-0-9795068-0-2
12-hour clock

The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translates to, before midday) and p.m. (from Latin post meridiem translates to, past midday). Each period consists of 12 hours numbered: 12 (acting as zero), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. The 24 hour/day cycle starts at 12 midnight (may be indicated as 12 a.m.), runs through 12 noon (may be indicated as 12 p.m.), and continues to the midnight at the end of the day. The 12-hour clock has been developed from the middle of the second millennium BC to the 16th century AD.

The 12-hour time convention is common in several English-speaking nations and former British colonies, as well as a few other countries.

12 o'clock

12 O'clock usually refers the time as shown on a 12-hour clock, either noon - 12 o'clock at daytime - or midnight - 12 o'clock at nighttime.

It may also refer to:

The corresponding clock position, straight ahead or directly above

A Wu-Tang Clan affiliate, 12 O'Clock

A community in Quinte West

12 O'Clock (1958 film), a Bollywood film starring Guru Dutt and Waheeda Rehman

12 O'Clock (in two parts), track in Heaven and Hell, a studio album by Greek electronic composer Vangelis


An astrarium, also called a planetarium, is the mechanical representation of the cyclic nature of astronomical objects in one timepiece. It is an astronomical clock.

BPL (time service)

BPL is the call sign of the official long-wave time signal service of the People's Republic of China, operated by the Chinese Academy of Sciences, broadcasting on 100 kHz from CAS's National Time Service Center in Pucheng County, Shaanxi at 34°56′54″N 109°32′34″E, roughly 70 km northeast of Lintong, along with NTSC's short-wave time signal BPM on 2.5, 5.0, 10.0, and 15.0 MHz.

BPL broadcasts LORAN-C compatible format signal from 5:30 to 13:30 UTC, using an 800 kW transmitter covering a radius up to 3000 km.

Big Ben (solitaire)

Big Ben (or known in other solitaire brands as Clock) is a solitaire card game which uses two decks of playing cards mixed together. It is basically a large-scale, two-deck version of Grandfather's Clock and is probably named after Big Ben, the colloquially used nickname for the bell at the tower of the Palace of Westminster in London.

Before the start of the game, the following cards are separated from the decks: 2♣, 3♥, 4♠, 5♦, 6♣, 7♥, 8♠, 9♦, 10♣, J♥, Q♠, K♦. These cards are used to form a circle arranged like numbers on a clock face with the 2♣ on the "9 o' clock" position, the 5♦ at the "12 o' clock" position, and the K♦ at the "8 o' clock." This will be the foundations, or the "inner circle" (otherwise known as the "clock").

Twelve piles of three cards are then dealt around the inner circle. These piles form the tableau, or the "outer circle." The top cards of the outer circle are available for play to the inner circle or around the outer circle. Building on the outer circle is down by suit, while the foundations in the inner circle are built up by suit until the last card corresponds to the its position on the clock (i.e. the Q♠ should be built up to 7♠, for instance). Building is also continuous, with Aces placed over Kings in the inner circle and vice versa in the outer circle.

The minimum number of cards in each pile in the outer circle is three. A pile containing less than three cards is said to have gaps; an empty pile has three "gaps," a pile having one card has two "gaps," and a pile with two cards has one "gap." As cards are built, "gaps" are formed and the only way these are "filled" is by dealing cards from the stock. Building on a pile having cards less than three is like "filling a gap" from the tableau and is therefore not allowed.

It is the player's discretion when to fill the "gaps," but when the player decides to do so, one has to fill all "gaps," i. e. replenish all piles with less than three cards so each of them contains three cards once again. For example, two piles are empty, one pile has one card left, and two piles have two cards left. So the player has to fill a total of 10 gaps. He does this by dealing cards one card per pile at a time clockwise starting from the pile above the "12 o' clock" foundation. No building is done until this process is complete. The player can do this as long as there are "gaps."

Sometimes, the player cannot make any moves even when all piles contain three cards each. So the player can deal cards from the stock one at a time. Cards that cannot be built either onto the inner or outer circles are placed on the wastepile (as a suggestion, one can place the waste pile at the center of the inner circle for convenience). Again, cards at the wastepile cannot be used to fill "gaps." But once the stock is exhausted, there are no re-deals; the game ends sooner after this or later.

The game is won when all foundations show cards corresponding to their positions in the clock (J♠ on "11 o' clock," Q♦ on "12 o' clock," A♣ on "1 o' clock," and so on.)

Carpe diem

Carpe diem is a Latin aphorism, usually translated "seize the day", taken from book 1 of the Roman poet Horace's work Odes (23 BC).


Chronometry (from Greek χρόνος chronos, "time" and μέτρον metron, "measure") is the science of the measurement of time, or timekeeping. Chronometry applies to electronic devices, while horology refers to mechanical devices.

It should not to be confused with chronology, the science of locating events in time, which often relies upon it.

Common year

A common year is a calendar year with 365 days, as distinguished from a leap year, which has 366. More generally, a common year is one without intercalation. The Gregorian calendar, (like the earlier Julian calendar), employs both common years and leap years to keep the calendar aligned with the tropical year, which does not contain an exact number of days.

The common year of 365 days has 52 weeks and one day, hence a common year always begins and ends on the same day of the week (for example, January 1 and December 31 fell on a Sunday in 2017) and the year following a common year will start on the subsequent day of the week. In common years, February has four weeks, so March will begin on the same day of the week. November will also begin on this day.

In the Gregorian calendar, 303 of every 400 years are common years. By comparison, in the Julian calendar, 300 out of every 400 years are common years, and in the Revised Julian calendar (used by Greece) 682 out of every 900 years are common years.


Endurantism or endurance theory is a philosophical theory of persistence and identity. According to the endurantist view, material objects are persisting three-dimensional individuals wholly present at every moment of their existence, which goes with an A-theory of time. This conception of an individual as always present is opposed to perdurantism or four dimensionalism, which maintains that an object is a series of temporal parts or stages, requiring a B-theory of time. The use of "endure" and "perdure" to distinguish two ways in which an object can be thought to persist can be traced to David Lewis.

Grandfather's Clock

Grandfather's Clock is a solitaire game using a deck of 52 playing cards. Its foundation is akin to Clock Solitaire; but while winning the latter depends on the luck of the draw, this game has a strategic side.

Before the game begins, the following cards are taken out of the deck: 2♥, 3♠, 4♦, 5♣, 6♥, 7♠, 8♦, 9♣, 10♥, J♠, Q♦, and K♣. They are then arranged in a circular fashion like a clock face with the 2♥ on the "five o' clock" position, 3♠ on the "six o' clock" position, and so on. These cards will be the foundations. The remaining cards are then shuffled and dealt into eight columns of five cards each on the tableau.

The object of the game is to distribute the cards to the foundations to the point that the top cards of the foundations show the correct numbers on the clock face. (A queen is equal to twelve, a jack eleven.)

Each foundation should be built up by suit until the card with the correct corresponding number on the clock face is placed. The cards on the tableau on the other hand are built down regardless of suit. The top cards of each column are the only ones available for play. Only one card can be played at a time and any space that occurs is filled with any available card.

The game ends either with all cards are put into the foundations with the clock face showing the correct numbers, or when there is a situation in the tableau that allows no more moves.


HD2IOA is the callsign of a time signal radio station operated by the Navy of Ecuador. The station is located at Guayaquil, Ecuador and transmits in the HF band on 3.81 and 7.6 MHz.The transmission is in AM mode with only the lower sideband (part of the time H3E and the rest H2B/H2D) and consists of 780 Hz tone pulses repeated every ten seconds and voice announcements in Spanish.

While sometimes this station is described as defunct, reception reports of this station on 3.81 MHz appear regularly at the Utility DX Forum.

Intercalation (timekeeping)

Intercalation or embolism in timekeeping is the insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require intercalations of both days and months.


The minute is a unit of time or angle. As a unit of time, the minute is most of times equal to ​1⁄60 (the first sexagesimal fraction) of an hour, or 60 seconds. In the UTC time standard, a minute on rare occasions has 61 seconds, a consequence of leap seconds (there is a provision to insert a negative leap second, which would result in a 59-second minute, but this has never happened in more than 40 years under this system). As a unit of angle, the minute of arc is equal to ​1⁄60 of a degree, or 60 seconds (of arc). Although not an SI unit for either time or angle, the minute is accepted for use with SI units for both. The SI symbols for minute or minutes are min for time measurement, and the prime symbol after a number, e.g. 5′, for angle measurement. The prime is also sometimes used informally to denote minutes of time.


Speedcubing (also known as speedsolving) is the hobby involving solving a variety of twisty puzzles, the most famous being the 3x3x3 puzzle or Rubik's Cube, as quickly as possible. For most puzzles, solving entails performing a series of moves that alters a scrambled puzzle into a state in which every face of the puzzle is a single, solid color. Some puzzles have different requirements to be considered solved, such as the Clock, for which all the dials must be moved into the 12 'o clock position.

The standard puzzle sizes are 2x2x2, 3x3x3, 4x4x4, 5x5x5, 6x6x6, and 7x7x7. There are also different shapes of the famous puzzles, including Pyraminx, Megaminx, Skewb, and Square-1. An individual who competes in speedcubing is known as a speedcuber.

Tempus fugit

Tempus fugit is a Latin phrase, usually translated into English as "time flies". The expression comes from line 284 of book 3 of Virgil's Georgics, where it appears as fugit inreparabile tempus: "it escapes, irretrievable time". The phrase is used in both its Latin and English forms as a proverb that "time's a-wasting". Tempus fugit, however, is typically employed as an admonition against sloth and procrastination (cf. carpe diem) rather than a motto in favor of licentiousness (cf. "gather ye rosebuds while ye may"); the English form is often merely descriptive: "time flies like the wind", "time flies when you're having fun".

The phrase's full appearance in the Georgics is:

The phrase is a common motto, particularly on sundials and clocks.

Tomorrow (time)

Tomorrow is a temporal construct of the relative future; literally of the day after the current day (today), or figuratively of future periods or times. Tomorrow is usually considered just beyond the present and counter to yesterday. It is important in time perception because it is the first direction the arrow of time takes humans on Earth.

UTC offset

The UTC offset is the difference in hours and minutes from Coordinated Universal Time (UTC) for a particular place and date. It is generally shown in the format ±[hh]:[mm], ±[hh][mm], or ±[hh]. So if the time being described is one hour ahead of UTC (such as the time in Berlin during the winter), the UTC offset would be "+01:00", "+0100", or simply "+01".

Every inhabited place in the world has a UTC offset that is a multiple of 15 minutes, and the majority of offsets (as well as all nautical time zones) are measured in whole hours.

UTC is the equivalent to GMT.


YVTO is the callsign of the official time signal from the Juan Manuel Cagigal Naval Observatory in Caracas, Venezuela. The content of YVTO's signal, which is a continuous 1 kW amplitude modulated carrier wave at 5.000 MHz, is much simpler than that broadcast by some of the other time signal stations around the world, such as WWV.

The methods of time transmission from YVTO are very limited. The broadcast employs no form of digital time code. The time of day is given in Venezuelan Standard Time (VET), and is only sent using Spanish language voice announcements. YVTO also transmits 100 ms-long beeps of 1000 Hz every second, except for thirty seconds past the minute. The top of the minute is marked by a 0.5 second 800 Hz tone.The station previously broadcast on 6,100 MHz but appears to have changed to the current frequency by 1990.

Yesterday (time)

Yesterday is a temporal construct of the relative past; literally of the day before the current day (today), or figuratively of earlier periods or times, often but not always within living memory.

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