That’s exactly why op said we should abandon Unix time. The “who cares about leap seconds” standards is called TAI, and the difference between TAI and Unix time

That’s exactly why op said we should abandon Unix time. The “who cares about leap seconds” standards is called TAI, and the difference between TAI and Unix time changes every time a leap second is introduced. Unix time decrees every day has exactly 86400 seconds. But the introduction of leap seconds means that While most days have 86400, some earth days have 86401 seconds and potentially there could also be days with 86399 TAI makes sense everywhere, Unix time only on earth.