It matters so much that the BIPM decided to abolish the leap second starting in 2035. See this post for a lot of the reasoning: https://engineering.fb.com/2022/

It matters so much that the BIPM decided to abolish the leap second starting in 2035. See this post for a lot of the reasoning: https://engineering.fb.com/2022/07/25/production-engineering/its-time-to-leave-the-leap-second-in-the-past/ https://engineering.fb.com/2022/07/25/production-engineering... It makes a lot of sense until you realize what we're doing. We're just turning UTC into a shittier version of TAI. After 2035, they will forevermore have a constant offset, but UTC will keep it's historical discontinuities. Why not just switch to TAI, which already exists, instead of destroying UTC to make a more-or-less redundant version of TAI?