# General **URL:** https://community.nwtime.org/c/general/4.md [Latest](https://community.nwtime.org/latest.md) · [Categories](https://community.nwtime.org/categories.md) · [Tags](https://community.nwtime.org/tags.md) --- ## [Welcome! 👋](https://community.nwtime.org/t/welcome/5)
**Author:** [@system](https://community.nwtime.org/u/system)\ **Replies:** 0\ **Last updated:** [November 11, 2025, 9:55pm UTC](https://community.nwtime.org/t/welcome/5 "2025-11-11T21:55:26Z")
We are so glad you joined Network Time Foundation’s Discourse Community. Looking for documentation for NTP, LinuxPTP, libptpmgmt, or Khronos? Search our knowledge base to find videos, presentations, and documentation fo… --- ## [About the General category](https://community.nwtime.org/t/about-the-general-category/3)
**Author:** [@system](https://community.nwtime.org/u/system)\ **Replies:** 0\ **Last updated:** [November 11, 2025, 9:55pm UTC](https://community.nwtime.org/t/about-the-general-category/3 "2025-11-11T21:55:18Z")
Create topics in the General category that are related to network time in general but not specific to one of the Projects (NTP, LinuxPTP, libptpmgmt, Khronos). This category contains a general events calendar. Click an … --- ## [Goodbye leap seconds, hello leap hour?](https://community.nwtime.org/t/goodbye-leap-seconds-hello-leap-hour/467)
**Author:** [@harlan](https://community.nwtime.org/u/harlan)\ **Replies:** 3\ **Last updated:** [October 20, 2026, 10:27am UTC](https://community.nwtime.org/t/goodbye-leap-seconds-hello-leap-hour/467 "2026-10-20T10:27:55Z")
At a recent global standards meeting the subject of “leap seconds” came up. The final decision was that starting on 20 May 2027, there will be no more leap second corrections, and instead the difference between UT0 and … --- ## [CGPM Kills Leap Seconds, Caps UTC Drift](https://community.nwtime.org/t/cgpm-kills-leap-seconds-caps-utc-drift/468)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [October 19, 2026, 2:25pm UTC](https://community.nwtime.org/t/cgpm-kills-leap-seconds-caps-utc-drift/468 "2026-10-19T14:25:58Z")
Overview of the ramifications of Continuous UTC --- ## [Earth Rotation Records Spur October Vote to Avert Negative Leap Second](https://community.nwtime.org/t/earth-rotation-records-spur-october-vote-to-avert-negative-leap-second/435)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 3\ **Last updated:** [October 17, 2026, 12:30am UTC](https://community.nwtime.org/t/earth-rotation-records-spur-october-vote-to-avert-negative-leap-second/435 "2026-10-17T00:30:22Z")
--- ## [Nov 2026 SyncUP: Khronos](https://community.nwtime.org/t/nov-2026-syncup-khronos/466)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [October 16, 2026, 1:50pm UTC](https://community.nwtime.org/t/nov-2026-syncup-khronos/466 "2026-10-16T13:50:47Z")
📅 November 6, 2026 11:00 AM → November 6, 2026 12:00 PM (America/Los\_Angeles) · https://us06web.zoom.us/j/83143322809?pwd=l1T9n217s2VUMGaQSDRJ7wScZozmmk.1 --- ## [Challenges and future for Time metrology](https://community.nwtime.org/t/challenges-and-future-for-time-metrology/465)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [October 15, 2026, 12:40pm UTC](https://community.nwtime.org/t/challenges-and-future-for-time-metrology/465 "2026-10-15T12:40:11Z")
Interesting topics on the agenda: A new definition of the second Continuous Coordinated Universal Time (UTC) Time on the Moon --- ## [How Proof of History Works](https://community.nwtime.org/t/how-proof-of-history-works/464)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [October 12, 2026, 6:55pm UTC](https://community.nwtime.org/t/how-proof-of-history-works/464 "2026-10-12T18:55:25Z")
Interesting overview of a cryptographic time-ordering mechanism. https://www.bybit.com/en/wiki/article/solana-proof-of-history-how-poh-works/ --- ## [NTS: Authenticated Time at Meta](https://community.nwtime.org/t/nts-authenticated-time-at-meta/461)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [October 8, 2026, 6:35pm UTC](https://community.nwtime.org/t/nts-authenticated-time-at-meta/461 "2026-10-08T18:35:34Z")
--- ## [The History of Floral Clocks: How Flowers Became Nature's Timekeepers](https://community.nwtime.org/t/the-history-of-floral-clocks-how-flowers-became-natures-timekeepers/463)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [October 8, 2026, 2:15pm UTC](https://community.nwtime.org/t/the-history-of-floral-clocks-how-flowers-became-natures-timekeepers/463 "2026-10-08T14:15:18Z")
--- ## [Why We Can't Fix The 2038 Problem](https://community.nwtime.org/t/why-we-cant-fix-the-2038-problem/460)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [September 25, 2026, 12:19am UTC](https://community.nwtime.org/t/why-we-cant-fix-the-2038-problem/460 "2026-09-25T00:19:19Z")
While upgrading to 64-bit systems offers a path forward, the real challenge lies in the millions of embedded devices that are harder to patch. Effective software engineering requires anticipating these overflows before t… --- ## [Timing Matters](https://community.nwtime.org/t/timing-matters/459)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [September 23, 2026, 1:57pm UTC](https://community.nwtime.org/t/timing-matters/459 "2026-09-23T13:57:32Z")
--- ## [GPS Week Number Rollover](https://community.nwtime.org/t/gps-week-number-rollover/446)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [September 4, 2026, 3:37pm UTC](https://community.nwtime.org/t/gps-week-number-rollover/446 "2026-09-04T15:37:23Z")
Meinberg has a great explanation of why this occurs and how to test with a GPS simulator. --- ## [India’s New IST Rules Raise Questions Over UTC Timestamps](https://community.nwtime.org/t/india-s-new-ist-rules-raise-questions-over-utc-timestamps/444)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [August 31, 2026, 7:27pm UTC](https://community.nwtime.org/t/india-s-new-ist-rules-raise-questions-over-utc-timestamps/444 "2026-08-31T19:27:16Z")
Liability sits with whoever uses the time, not whoever supplies it. The obligation is to monitor drift, log it and prove traceability on demand. For a bank or a stock exchange, that is existing practice. For a district a… --- ## [AI’s impact on time synchronization in OT](https://community.nwtime.org/t/ai-s-impact-on-time-synchronization-in-ot/443)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [August 27, 2026, 4:24pm UTC](https://community.nwtime.org/t/ai-s-impact-on-time-synchronization-in-ot/443 "2026-08-27T16:24:02Z")
What happens when a system built on probability begins advising infrastructure that depends on certainty? --- ## [Non-local synchronization of continuous time crystals in a semiconductor](https://community.nwtime.org/t/non-local-synchronization-of-continuous-time-crystals-in-a-semiconductor/441)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [August 14, 2026, 2:48pm UTC](https://community.nwtime.org/t/non-local-synchronization-of-continuous-time-crystals-in-a-semiconductor/441 "2026-08-14T14:48:39Z")
Synchronization resulting in unified collective behavior of the individual elements of a system that are weakly coupled to each other has long fascinated scientists. Examples range from the periodic oscillation of couple… --- ## [GPS-Free Timing Reaches National Scale: CESNET Joins White Rabbit Collaboration](https://community.nwtime.org/t/gps-free-timing-reaches-national-scale-cesnet-joins-white-rabbit-collaboration/440)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [August 7, 2026, 3:25pm UTC](https://community.nwtime.org/t/gps-free-timing-reaches-national-scale-cesnet-joins-white-rabbit-collaboration/440 "2026-08-07T15:25:26Z")
Two countries have now independently demonstrated what the timing world has been debating for years: that fiber-optic networks can replace satellite signals as the source of national-scale precision time synchronization,… --- ## [Telstra had a REALLY bad time last week](https://community.nwtime.org/t/telstra-had-a-really-bad-time-last-week/438)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [July 31, 2026, 3:50pm UTC](https://community.nwtime.org/t/telstra-had-a-really-bad-time-last-week/438 "2026-07-31T15:50:11Z")
@geerlingguy demonstrates hardware that helps to explain how Telstra was bitten by the GPS rollover bug --- ## [Telstra ignored warnings about equipment issue ahead of national outage,](https://community.nwtime.org/t/telstra-ignored-warnings-about-equipment-issue-ahead-of-national-outage/437)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [July 17, 2026, 12:57pm UTC](https://community.nwtime.org/t/telstra-ignored-warnings-about-equipment-issue-ahead-of-national-outage/437 "2026-07-17T12:57:56Z")
United States-based supplier Microchip Technology warned the telco multiple times that a Network Time Protocol server required a software update to prevent a “rollover problem”… --- ## [From Stratum-1 NTP/RDATE to a Sub-Microsecond PTPv2 Grandmaster](https://community.nwtime.org/t/from-stratum-1-ntp-rdate-to-a-sub-microsecond-ptpv2-grandmaster/434)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [July 12, 2026, 2:14pm UTC](https://community.nwtime.org/t/from-stratum-1-ntp-rdate-to-a-sub-microsecond-ptpv2-grandmaster/434 "2026-07-12T14:14:16Z")
Bottom of article has link to github repo containing source code and schematics. --- ## [A timing glitch was behind Telstra’s nationwide outage](https://community.nwtime.org/t/a-timing-glitch-was-behind-telstra-s-nationwide-outage/433)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [July 9, 2026, 3:26pm UTC](https://community.nwtime.org/t/a-timing-glitch-was-behind-telstra-s-nationwide-outage/433 "2026-07-09T15:26:19Z")
A faulty update caused some of Telstra’s servers to reset their clocks by almost 20 years, making them believe it was November 2006. --- ## [NASA Advancements using GNSS for Space Operations and Science](https://community.nwtime.org/t/nasa-advancements-using-gnss-for-space-operations-and-science/432)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [June 30, 2026, 12:12pm UTC](https://community.nwtime.org/t/nasa-advancements-using-gnss-for-space-operations-and-science/432 "2026-06-30T12:12:45Z")
Provides an update on LunaNet. The links on page 15 for the LuGRE results are interesting as they include the open dataset and the published paper explaining the results. Parker 2026-04\_CGSIC\_NASA\_v1.0.pdf (6.5 MB) --- ## [June 2026 SyncUp](https://community.nwtime.org/t/june-2026-syncup/430)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 2\ **Last updated:** [June 30, 2026, 11:49am UTC](https://community.nwtime.org/t/june-2026-syncup/430 "2026-06-30T11:49:31Z")
Join us for our next community gathering to discuss the Epochalypse–a series of upcoming critical rollover events also known as Y2K38. --- ## [Using CPU Busywork to Create the "World's Most Stable Raspberry Pi"](https://community.nwtime.org/t/using-cpu-busywork-to-create-the-worlds-most-stable-raspberry-pi/431)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 2\ **Last updated:** [June 24, 2026, 8:22am UTC](https://community.nwtime.org/t/using-cpu-busywork-to-create-the-worlds-most-stable-raspberry-pi/431 "2026-06-24T08:22:03Z")
No, this isn’t about crashes — but about getting timing drift down as low as possible by stabilizing the on-board crystal’s temperature. --- ## [The Y2K bug is back! Dutch dev digs up untimely flaw in old BSD build](https://community.nwtime.org/t/the-y2k-bug-is-back-dutch-dev-digs-up-untimely-flaw-in-old-bsd-build/429)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 0\ **Last updated:** [June 16, 2026, 1:15pm UTC](https://community.nwtime.org/t/the-y2k-bug-is-back-dutch-dev-digs-up-untimely-flaw-in-old-bsd-build/429 "2026-06-16T13:15:30Z")
26 years late and no threat unless you still run a PDP-11/70 and rely on short-wave timekeeping broadcasts… --- ## [Let's spread the word about the NTF!](https://community.nwtime.org/t/lets-spread-the-word-about-the-ntf/427)
**Author:** [@kjsisco](https://community.nwtime.org/u/kjsisco)\ **Replies:** 0\ **Last updated:** [June 15, 2026, 8:23pm UTC](https://community.nwtime.org/t/lets-spread-the-word-about-the-ntf/427 "2026-06-15T20:23:41Z")
On my podcast known as The Sisco Report, I talked about the Network Time Foundation. This is the link to it on the Internet Archive: --- ## [SatPulse 0.2 released](https://community.nwtime.org/t/satpulse-0-2-released/413)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [June 14, 2026, 3:58pm UTC](https://community.nwtime.org/t/satpulse-0-2-released/413 "2026-06-14T15:58:31Z")
SatPulse is a daemon and suite of tools, written in Go, designed to make it easy to build a PTP grandmaster based on ptp4l, using a GNSS receiver as a source of time. --- ## [Forward to the Past: The Y2K38 Problem Ahead](https://community.nwtime.org/t/forward-to-the-past-the-y2k38-problem-ahead/422)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 5\ **Last updated:** [June 11, 2026, 6:48pm UTC](https://community.nwtime.org/t/forward-to-the-past-the-y2k38-problem-ahead/422 "2026-06-11T18:48:18Z")
We took a sample of approximately 1.5 million public-facing NTP services reachable, and out of those, roughly 200 000 provide enough details about their underlying version and architecture to perform a targeted assessmen… --- ## [Precision timekeeping with atomic clocks: evolution and future directions](https://community.nwtime.org/t/precision-timekeeping-with-atomic-clocks-evolution-and-future-directions/421)
**Author:** [@Dru](https://community.nwtime.org/u/Dru)\ **Replies:** 1\ **Last updated:** [June 8, 2026, 3:17pm UTC](https://community.nwtime.org/t/precision-timekeeping-with-atomic-clocks-evolution-and-future-directions/421 "2026-06-08T15:17:40Z")
This paper provides an overview of the evolution of timekeeping, with a particular emphasis on atomic clocks, followed by a discussion on the evolving trends in global timekeeping, including the definition of the SI seco… --- ## [PNT cyber guidance update – NIST wants your input](https://community.nwtime.org/t/pnt-cyber-guidance-update-nist-wants-your-input/420)
**Author:** [@DavbarrNTF](https://community.nwtime.org/u/DavbarrNTF)\ **Replies:** 0\ **Last updated:** [June 3, 2026, 8:12pm UTC](https://community.nwtime.org/t/pnt-cyber-guidance-update-nist-wants-your-input/420 "2026-06-03T20:12:22Z")
https://rntfnd.org/2026/05/15/pnt-cyber-guidance-update-nist-wants-your-input/ [Next page](https://community.nwtime.org/c/general/4.md?page=1)