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==External links==
{{commons category|Leap second}}
*[https://www.iers.org/IERS/EN/Publications/Bulletins/bulletins.html IERS Bulletins, including Bulletin C (leap second announcements)]
*[http://www.leapsecond.com/ LeapSecond.com – A web site dedicated to precise time and frequency]
*[https://www.nist.gov/pml/time-and-frequency-division/leap-seconds-faqs NIST FAQ about leap year and leap second]
*[https://www.cl.cam.ac.uk/~mgk25/time/metrologia-leapsecond.pdf The leap second: its history and possible future]
*
*{{cite web|url=https://support.microsoft.com/help/2722715/support-for-the-leap-second|title=Support for the leap second|website=Microsoft Support|date=4 October 2018}}
*
*{{cite web|url=https://techcommunity.microsoft.com/t5/Networking-Blog/Leap-Seconds-for-the-IT-Pro-What-you-need-to-know/ba-p/339811|title=Leap Seconds for the IT Pro: What you need to know|author=Dan Cuomo|website=Windows Server – Networking Blog|date=17 October 2018}}
*
*{{cite web|url=https://techcommunity.microsoft.com/t5/Networking-Blog/Leap-Seconds-for-the-AppDev-What-you-should-know/ba-p/339813|title=Leap Seconds for the AppDev: What you should know|author=Travis Luke|website=Windows Server – Networking Blog|date=24 October 2018}}
*
*{{cite web|url=https://safran-navigation-timing.com/leap-second-readiness-tips-a-guide-for-managers-of-critical-it-infrastructure/|title=Leap Second Readiness Tips|publisher=Safran (formerly Orolia)|website=safran-navigation-timing.com|date=31 December 2018}}
* Judah Levine's Everyday Time and Atomic Time series
**
**{{cite web|url=https://nist.medium.com/everyday-time-and-atomic-time-part-one-9107b60fd9d0
**
|author=Judah Levine
**
|title=Everyday Time and Atomic Time: Part One
**
|publisher=National Institute of Standards and Technology
**
|date=31 March 2021}}
**{{cite web|url=https://nist.medium.com/everyday-time-and-atomic-time-part-2-65bb74d04f50
|author=Judah Levine
|title=Everyday Time and Atomic Time: Part Two
|publisher=National Institute of Standards and Technology
|date=7 April 2021}}
**{{cite web|url=https://nist.medium.com/everyday-time-and-atomic-time-part-3-24421c7a8c0f
|author=Judah Levine
|title=Everyday Time and Atomic Time: Part Three
|publisher=National Institute of Standards and Technology
|date=14 April 2021}}
**{{cite web|url=https://nist.medium.com/everyday-time-and-atomic-time-part-4-5d9b27820851
|author=Judah Levine
|title=Everyday Time and Atomic Time: Part Four
|publisher=National Institute of Standards and Technology
|date=21 April 2021}}
**{{cite web|url=https://nist.medium.com/everyday-time-and-atomic-time-part-5-1a9f063a8b1b
|author=Judah Levine
|title=Everyday Time and Atomic Time: Part Five
|publisher=National Institute of Standards and Technology
|date=28 April 2021}}
{{Time Topics}}
{{Time measurement and standards}}
{{New Year}}
{{DEFAULTSORT:Leap Second}}
[[Category:Timekeeping]]
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