Resolution 5 of the 28th CGPM (2026)

BIPM, responsible for standards, has decided not to include leap seconds moving time forward or backward during the General Conference on Weights and Measures (CGPM). This was announced to relief by time keeping professionals everywhere, for fear of things breaking. In the notes BIPM says:

a negative leap second has not previously been applied, and it is considered to pose a high risk of causing anomalies and disruption to critical infrastructures that are largely unprepared, and the preparation would create, for the industries that rely on time synchronization, a need for financial investment, whose amount is estimated to be similar to their preparations for the millennium bug,

Scary Y2K. It was also note that the frequency of these leap seconds in the coming years would cause repeating problems. The leap second was introduced to algin UTC, which increments atomically, to solar time (UT1), which is based on the Earth's rotation of the sun.

During this conference, the time keepers of the Earth have decided to keep the maxium difference between UT1nd UTC to 1 hour which means UTC will stay the same for "several centuries".