Unix Time et Epoch — Fil d'actualité
Articles sélectionnés sur les timestamps Unix, l'UTC, le problème de l'an 2038, les changements de fuseau et la base de données des fuseaux IANA.
House Committee Advances Permanent Daylight Saving Time Proposal
The U.S. House Energy and Commerce Committee moved Sunshine Protection Act language into a broader transportation bill, giving permanent daylight saving time its clearest House path since the 2022 Senate vote.
NTPv5 Draft Makes Timescales and Eras Explicit for Network Time
The active IETF NTPv5 draft separates UTC, TAI, UT1, and leap-smeared UTC in the protocol, while keeping NTP era handling visible ahead of the 2036 network-time rollover.
Node.js 26 Enables Temporal by Default for Server-Side Timestamp Code
Node.js 26 turns on JavaScript Temporal by default, giving server-side code a built-in path for exact instants, wall-clock dates, and timezone-aware date-time work beyond legacy Date.
tzdata 2026a Moves Leap-Second-Aware TZif Files Out of the Default Build
IANA's March 2026 tzdata and tzcode release corrected Moldova's clock rules and changed the default build so leap-second-aware "right" TZif files are no longer installed automatically.
British Columbia's Final Clock Change Lands in tzdata 2026b
British Columbia moved to permanent UTC-7 after its March 2026 spring-forward, and IANA tzdata 2026b now carries the rule that prevents most of the province from falling back in November.
JavaScript Temporal API Reaches Stage 4 — Firefox Ships It by Default
After nine years of design work, the TC39 Temporal proposal reached Stage 4 in early 2025. Firefox 139 became the first major browser to ship Temporal enabled by default in May 2025, with Chrome and Safari implementations following.
Debian 13 Makes 64-Bit Timestamps the Default on All Architectures
Debian "Trixie" (Debian 13), expected mid-2025, made 64-bit time_t the default for all remaining 32-bit architectures, closing the last major Linux distribution gap ahead of the January 2038 Unix overflow deadline.
The Long Push to End Daylight Saving Time in the United States
The US Senate unanimously passed the Sunshine Protection Act in 2022, yet clocks still change twice a year. A look at where the federal bill stands, which states have already acted, what Trump said in December 2024, and why sleep scientists are urging the opposite of what Congress is proposing.
IANA Timezone Database: Kazakhstan, Paraguay and Chile Rewrite Their Clocks
The 2024 and 2025 tzdata releases brought significant changes: Kazakhstan unified all regions on UTC+5, Paraguay adopted a permanent -03 offset ending DST, and Chile created a new timezone for its Aysén region.
Melting Ice Sheets May Delay the First-Ever Negative Leap Second
A 2024 Nature study found that accelerated glacial melt is slightly speeding up Earth's rotation, pushing back the predicted arrival of a negative leap second -- an event that has never occurred and that network engineers have long dreaded.
ITU World Radiocommunication Conference Formally Endorses Leap Second Abolition
The ITU-R World Radiocommunication Conference 2023 (WRC-23), held in Dubai, formally adopted a resolution endorsing the BIPM's 2022 vote to eliminate leap seconds from UTC by 2035, aligning international telecom standards with the metrology decision.
IANA Releases Three Timezone Database Updates in 2023
The Internet Assigned Numbers Authority published tzdata 2023a, 2023b, and 2023c throughout the year, covering rule changes in Egypt, Greenland, and several Pacific Island nations -- a reminder that political decisions can break software overnight.
World Metrology Body Votes to Abolish the Leap Second by 2035
The International Bureau of Weights and Measures (BIPM) voted in November 2022 to eliminate the leap second by 2035, ending five decades of an irregular timekeeping practice that has caused crashes at Reddit, Cloudflare, and countless other systems.
Linux 5.6 Brings Full 64-Bit Time to 32-Bit Systems
The Linux 5.6 kernel, released March 2020, completed a multi-year effort to make the kernel's internal timekeeping 64-bit clean on 32-bit architectures -- a foundational fix for the Year 2038 problem that still affects embedded Linux devices worldwide.