Leap second

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Leap second

Quality:

Leap second - extra second inserted or removed to keep civil time in sync with the Earth's rotation. Article "Leap second" in Simple English Wikipedia has 27.6 points for quality (as of July 1, 2025). The article contains 7 references and 2 sections.

This article has the best quality in Chinese Wikipedia. However, the most popular language version of this article is English.

Since the creation of article "Leap second", its content was written by 1 registered users of Simple English Wikipedia and edited by 1866 registered Wikipedia users in all languages.

The article is cited 9 times in Simple English Wikipedia and cited 2601 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Simple English): #14815 in January 2025
  • Global: #85 in November 2001

The highest popularity rank from 2008:

  • Local (Simple English): #34051 in May 2025
  • Global: #659 in June 2015

There are 45 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1Chinese (zh)
闰秒
84.9475
2English (en)
Leap second
84.3422
3Japanese (ja)
閏秒
58.3576
4Greek (el)
Εμβόλιμο δευτερόλεπτο
56.2678
5Malay (ms)
Saat lompat
56.2629
6Ukrainian (uk)
Високосна секунда
49.2241
7French (fr)
Seconde intercalaire
35.5278
8German (de)
Schaltsekunde
35.0029
9Russian (ru)
Дополнительная секунда
34.7932
10Finnish (fi)
Karkaussekunti
34.2545
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "Leap second" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Leap second
4 516 246
2Japanese (ja)
閏秒
1 291 629
3German (de)
Schaltsekunde
568 047
4Russian (ru)
Дополнительная секунда
422 238
5Spanish (es)
Segundo intercalar
231 595
6Polish (pl)
Sekunda przestępna
226 111
7French (fr)
Seconde intercalaire
213 975
8Chinese (zh)
闰秒
202 583
9Italian (it)
Secondo intercalare
176 551
10Dutch (nl)
Schrikkelseconde
141 722
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2025

The most popular language versions of the article "Leap second" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Leap second
14 798
2Russian (ru)
Дополнительная секунда
2 507
3Japanese (ja)
閏秒
2 276
4German (de)
Schaltsekunde
1 248
5Chinese (zh)
闰秒
1 245
6Spanish (es)
Segundo intercalar
710
7Italian (it)
Secondo intercalare
533
8French (fr)
Seconde intercalaire
526
9Polish (pl)
Sekunda przestępna
403
10Dutch (nl)
Schrikkelseconde
251
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "Leap second" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Leap second
500
2German (de)
Schaltsekunde
196
3French (fr)
Seconde intercalaire
129
4Japanese (ja)
閏秒
101
5Italian (it)
Secondo intercalare
75
6Dutch (nl)
Schrikkelseconde
74
7Russian (ru)
Дополнительная секунда
74
8Chinese (zh)
闰秒
66
9Polish (pl)
Sekunda przestępna
57
10Hebrew (he)
דקה מעוברת
56
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2025

Language versions of the article "Leap second" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Polish (pl)
Sekunda przestępna
3
2Chinese (zh)
闰秒
3
3Italian (it)
Secondo intercalare
2
4Belarusian (be)
Высакосная секунда
1
5German (de)
Schaltsekunde
1
6English (en)
Leap second
1
7Hebrew (he)
דקה מעוברת
1
8Thai (th)
อธิกวินาที
1
9Arabic (ar)
ثانية كبيسة
0
10Bulgarian (bg)
Високосна секунда
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "Leap second" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Leap second
329
2Japanese (ja)
閏秒
208
3Tamil (ta)
லீப் நொடி
193
4Ukrainian (uk)
Високосна секунда
185
5Arabic (ar)
ثانية كبيسة
137
6Persian (fa)
ثانیه کبیسه
132
7Korean (ko)
윤초
123
8Russian (ru)
Дополнительная секунда
120
9Turkish (tr)
Artık saniye
120
10Italian (it)
Secondo intercalare
111
More...

Scores

Estimated value for Wikipedia:
Simple English:
Global:
Popularity in June 2025:
Simple English:
Global:
Popularity in all years:
Simple English:
Global:
Authors in June 2025:
Simple English:
Global:
Registered authors in all years:
Simple English:
Global:
Citations:
Simple English:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
ثانية كبيسة
beBelarusian
Высакосная секунда
bgBulgarian
Високосна секунда
caCatalan
Segon intercalar
csCzech
Přestupná sekunda
daDanish
Skudsekund
deGerman
Schaltsekunde
elGreek
Εμβόλιμο δευτερόλεπτο
enEnglish
Leap second
eoEsperanto
Supersekundo
esSpanish
Segundo intercalar
etEstonian
Liigsekund
euBasque
Segundo gehigarri
faPersian
ثانیه کبیسه
fiFinnish
Karkaussekunti
frFrench
Seconde intercalaire
heHebrew
דקה מעוברת
hrCroatian
Prijestupna sekunda
huHungarian
Szökőmásodperc
hyArmenian
Կոորդինացիոն վայրկյան
idIndonesian
Detik kabisat
itItalian
Secondo intercalare
jaJapanese
閏秒
koKorean
윤초
laLatin
Secundum intercalarium
msMalay
Saat lompat
nlDutch
Schrikkelseconde
noNorwegian
Skuddsekund
plPolish
Sekunda przestępna
ptPortuguese
Segundo intercalar
roRomanian
Secundă intercalată
ruRussian
Дополнительная секунда
shSerbo-Croatian
Prijestupna sekunda
simpleSimple English
Leap second
skSlovak
Priestupná sekunda
slSlovenian
Prestopna sekunda
srSerbian
Prestupna sekunda
svSwedish
Skottsekund
taTamil
லீப் நொடி
thThai
อธิกวินาที
trTurkish
Artık saniye
ukUkrainian
Високосна секунда
urUrdu
لیپ سیکنڈ
viVietnamese
Giây nhuận
zhChinese
闰秒

Popularity rank trends

Best Rank Simple English:
#34051
05.2025
Global:
#659
06.2015

AI rank trends

Best Rank Simple English:
#14815
01.2025
Global:
#85
11.2001

Global popularity rank history

Global AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Leap second from Wikipedia articles about Coordinated Universal Time, Unix time, Leap year, Second and Atomic clock. Whereas reading the article about Leap second people most often go to Wikipedia articles on International Atomic Time, Coordinated Universal Time, Universal time, Leap year and ΔT.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

ja: 閏秒
zh: 闰秒
ko: 윤초
simple: Leap second

News from 12 August 2025

On 12 August 2025 in multilingual Wikipedia, Internet users most often read articles on the following topics: Cristiano Ronaldo, Wednesday, Georgina Rodríguez, ChatGPT, Weapons, Jenna Ortega, deaths in 2025, Taylor Swift, Miguel Uribe Turbay, 2025–26 UEFA Champions League.

In Simple English Wikipedia the most popular articles on that day were: Free Republic of Verdis, SOLID (object-oriented design), Wikimedia Foundation, Black, XXXTentacion, List of U.S. states and territories by time zone, Youmna Khoury, List of U.S. states, List of European countries, List of people who have walked on the Moon.

About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information