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Category:Timekeeping

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chronometry

specifying measures of time-mesaurement in clear reference units

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Subclass of

measurement

Authority file
Q186398 GND ID: 4131097-4 Library of Congress authority ID: sh85135420 Bibliothèque nationale de France ID: 119594752 BNCF Thesaurus ID: 30250 NL CR AUT ID: ph136869, ph184822 J9U ID: 987007536563305171
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Subcategories

This category has the following 46 subcategories, out of 46 total.

Timekeeping by country (3 C)

!

Gallery pages of timekeeping (18 P)

*

A

Time in astronomy (4 C, 3 F)

B

Time balls (15 C, 34 F)

C

Calendars (44 C, 5 P, 485 F)
Ceramic resonators (9 F)
ChampionChip (6 F)
Timekeeping components (2 C, 1 F)
Crystal oscillators (3 C, 87 F)
Crystal resonator (3 C, 67 F)

D

Date (UNIX) (3 F)
Dating stamps (6 C, 4 F)
Time of day (18 C, 1 P, 2 F)
Daylight saving time (11 C, 70 F)
Decimal time (1 C, 1 F)
Timekeeping devices in the National Maritime Museum, London (5 C)

E

Errors in timekeeping (3 F)
Timekeeping exhibition (Deutsches Museum) (1 C, 6 F)

F

Frequency counters (4 C, 27 F)
Time and frequency standards (2 C, 26 F)

G

Greenwich Time Signal (4 F)
Time guns (9 C, 10 F)

H

Hexadecimal time (6 F)
Horology (13 C, 178 F)
Hours meters (8 F)

I

Indicators of local time (7 F)

M

Mechanical resonators (7 C, 4 F)

N

New Year celebrations (55 C, 276 F)
NHK Clock (3 F)
Nürnberger Uhr (2 F)

P

Photoelectric sensors (47 F)
Time in physics (7 C, 2 F)

R

Ancient Roman time keeping (1 C, 12 F)

S

Clocks and timekeeping exhibits in the Science Museum, London (3 C, 11 F)
Time signal devices (8 F)
Time signal radio stations (15 C, 18 F)
Stopwatches (7 C, 1 P, 101 F)
Synchronization (32 C, 226 F)

T

Time-tracking software (1 C, 1 F)
Timepieces (6 C, 16 F)
Timers (10 C, 73 F)
Timestamps (2 C, 15 F)

W

Working time (7 C, 73 F)

Pages in category "Timekeeping"

This category contains only the following page.

C

Circa

Media in category "Timekeeping"

The following 87 files are in this category, out of 87 total.

2011 08 20 CP analemmatique2.png 1,153 × 1,936; 139 KB
2013 Longines Global Champions - Lausanne - 14-09-2013 - Cellule 1.jpg 2,620 × 3,956; 10.04 MB
2013 Longines Global Champions - Lausanne - 14-09-2013 - Cellule.jpg 3,264 × 4,928; 17.25 MB
2019120304 Casio ProTrek PRW 60Y-1AER display stopwatch 2019.jpg 6,016 × 4,000; 7.76 MB
4 yugas.PNG 657 × 171; 9 KB
A Train driver Counting down at a Platform on Shōnan-Shinjuku Line.jpg 5,383 × 3,589; 23.48 MB
A Treatise on Zodiacal Signs and Constallations- Unique Jewels on the Benefits of Keeping Time WDL3204.pdf 900 × 1,312, 73 pages; 6.39 MB
Back side of disposable RFID tag used for race timing.png 256 × 171; 80 KB
Basicot.png 892 × 621; 84 KB
Begin CEST Transparent.png 250 × 250; 7 KB
Begin CEST.png 250 × 250; 5 KB
Begin CEST.svg 250 × 250; 6 KB
Begin CESTR Transparent.png 250 × 250; 5 KB
Berlin Rollt, Berlin (IF4A0037).jpg 3,734 × 4,668; 5.56 MB
Berlin Rollt, Berlin (IF4A0054).jpg 3,840 × 5,760; 5.85 MB
Bracelet Puce.jpg 5,184 × 3,456; 5.08 MB
CBS & WTOP microphones, and Stop watch, National Museum of American History.jpg 3,872 × 2,592; 2.54 MB
CET-12hr Spiral.jpg 1,280 × 1,024; 412 KB
CET-24hr-NorthPolarProjection.png 1,280 × 1,024; 405 KB
Chronometerpruefungsinstitut.jpg 340 × 153; 18 KB
Compendium on Using the Device Known as the Almucantar Quarter WDL2851.jpg 1,024 × 1,384; 88 KB
CVSup.png 738 × 398; 7 KB
DateForPoster.png 389 × 77; 18 KB
Daylight saving time begin UTC+2.png 250 × 250; 8 KB
Daylight saving time end UTC+2.png 250 × 250; 8 KB
Deliverance from Error on Knowledge of Times of Day and the Direction of Prayer WDL2855.jpg 1,024 × 1,347; 121 KB
Der Start der RAK3 Draisine von Opel am 23. Juni 1928 im niedersächsischen Burgwedel.tif 4,429 × 3,071; 7.38 MB
DST begin.svg 250 × 250; 719 bytes
DST end.svg 250 × 250; 970 bytes
DT-Дополнительная-секунда.svg 579 × 471; 521 KB
EmbeddedSynchronousSignalling.png 352 × 121; 8 KB
End CEST in Israel.svg 250 × 250; 10 KB
End CEST Transparent.png 250 × 250; 9 KB
End CEST.png 250 × 250; 5 KB
End CEST.svg 250 × 250; 942 bytes
Finish-SprintforSight-Large.jpg 500 × 386; 66 KB
Gaa scoreboard smaple.jpg 599 × 337; 32 KB
GPT-4 does not know the current year - explainability, contextuality and accuracy of ChatGPT output.png 1,324 × 1,418; 326 KB
Helsingin olympialaiset 1952 - XLVIII-278 - hkm.HKMS000005-km0000mrdq.jpg 3,543 × 2,869; 1.81 MB
High-accuracy settling time measurements.pdf 1,275 × 1,650, 6 pages; 3.8 MB
HistofLeavebyCountry.png 580 × 383; 9 KB
Improvements in Atomic Clock Accuracy.jpg 1,417 × 1,029; 224 KB
IPTAtimeBox1.jpg 1,700 × 1,504; 262 KB
Leap hour.svg 331 × 90; 10 KB
Locman 2006.jpg 1,329 × 1,961; 485 KB
Locman Montecristo.jpg 1,037 × 1,481; 232 KB
Locman Teseo Tesei.jpg 1,449 × 1,977; 347 KB
Maximum Benefit from the Knowledge of Circles of Projection on the 30 Degree Northern Latitude WDL2854.jpg 1,024 × 1,405; 135 KB
Measurement; a scholar making observations of a pendulum, wi Wellcome V0024586.jpg 3,025 × 2,384; 3.13 MB
Muhammad Qunawi, timekeeping by the stars.jpg 434 × 683; 104 KB
Nocturlabe Vienne IMG 8668.jpg 2,304 × 3,456; 3.98 MB
Nocturnal (instrument) - transparent.png 600 × 900; 572 KB
Nocturnal (instrument).jpg 652 × 892; 50 KB
Nürnberger Uhr.svg 2,292 × 1,421; 465 KB
Oil-lamp clock00.jpg 366 × 800; 40 KB
Olaus Magnus - On Time Measurement with Shadows.jpg 1,300 × 600; 332 KB
Palomar Observatory 2012 17.jpg 3,456 × 5,184; 4 MB
Principe-recoupement.svg 354 × 195; 5 KB
Principe-superposition.svg 354 × 195; 4 KB
Rallye Monte-Carlo Historique 2025, Bad Homburg (P1032951).jpg 3,473 × 2,605; 3.78 MB
Route 234 RT bus at Woodcote Green - geograph.org.uk - 1456389.jpg 640 × 341; 61 KB
Seasonal Almanac Based on the Coptic Calendar WDL2842.jpg 1,024 × 1,360; 109 KB
Setnakht-clepsydre.jpg 500 × 308; 32 KB
SpringFwd-FallBack.jpg 1,280 × 1,024; 1,013 KB
SpringFwd-FallBack.png 1,280 × 1,024; 544 KB
SyncMLPackages-fr.png 397 × 458; 17 KB
SyncMLPackages.png 397 × 458; 18 KB
Terminator line January.png 290 × 150; 61 KB
The Book of Remedies from Deficiencies in Setting Up Marble Sundials WDL2841.jpg 1,024 × 1,252; 121 KB
The Book of the Table Regarding the Knowledge of the Time and the Heavens for the Calculation of the Beginning of the Islamic and Christian Months WDL4294.pdf 900 × 1,233, 25 pages; 2.75 MB
The central clock of the broadcasting station in Lahti, 1935.jpg 4,824 × 6,864; 3.86 MB
The Hornblast in Ripon (cropped).jpg 235 × 356; 14 KB
The Hornblast in Ripon.jpg 409 × 640; 66 KB
The Lights of the Stars WDL4300.pdf 900 × 1,187, 782 pages; 73.65 MB
The Travelers Guide on Drawing the Circle of Projection WDL2853.jpg 1,024 × 1,288; 146 KB
Timekeeping Tools (Unsplash).jpg 5,184 × 3,456; 5.64 MB
Tombe-RamsèsVI-clepsydre.jpg 500 × 385; 81 KB
Treatise for Observers on Constructing the Circle of Projection WDL2849.jpg 1,024 × 1,343; 109 KB
UTC hue4map X world CET-24h-NorthPolarProjection.png 1,280 × 1,024; 246 KB
Waltham model 1899 pocket watch.jpg 4,000 × 3,000; 2 MB
Yıldız günü.jpg 376 × 402; 27 KB
Ytterbium Lattice Double Clock with Photons at NIST.jpg 2,400 × 1,600; 563 KB
Yugas.png 370 × 395; 6 KB
МСЭ-R TF.460-6 Рисунок 3.svg 543 × 169; 339 KB
МСЭ-R TF.460-6 Рисунок 4.svg 551 × 170; 334 KB
タイムキーパー (4025783269).jpg 1,936 × 1,296; 1.17 MB
時報用ドラとチューブラベル.jpg 3,648 × 2,056; 2.61 MB

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