⏰Leap Seconds End in 2027, UTC-UT1 Gap Widens to 1 Hour
UTC and UT1 are about to diverge, forever
TL;DR
Starting May 20, 2027, leap seconds will end, allowing UTC to drift up to 1 hour from UT1. This change simplifies timekeeping but may affect systems reliant on precise time synchronization.
Starting May 20, 2027, the General Conference on Weights and Measures will end leap seconds, allowing UTC to drift up to 1 hour from UT1. This change simplifies timekeeping but could disrupt systems reliant on precise time synchronization. Leap seconds, added since 1972, have been a headache for developers and system administrators, causing issues like network time discrepancies and potential system failures. The proposal increases the permitted difference between UTC and UT1 from 0.9 seconds to one hour, avoiding leap-second adjustments for centuries. This decision is supported by many national bodies and will take effect on May 20, 2027. However, it's crucial for teams managing time-sensitive applications to prepare for this change.
Key Points
Starting May 20, 2027, leap seconds will end, allowing UTC to drift up to 1 hour from UT1.
Leap seconds, added since 1972, have caused issues like network time discrepancies and potential system failures.
The proposal increases the permitted difference between UTC and UT1 from 0.9 seconds to one hour, avoiding adjustments for centuries.
This change simplifies timekeeping but may affect systems reliant on precise time synchronization, such as astronomy and navigation.
The decision is supported by many national bodies and will take effect on May 20, 2027, with UT1 continuing to be monitored.
Why It Matters
If you manage time-sensitive applications, the end of leap seconds on May 20, 2027, means you'll need to update your systems to handle a potential 1-hour drift from UT1. This change simplifies timekeeping but could disrupt systems reliant on precise time synchronization, such as astronomy and navigation.
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