There are not alway 86400s in 1 day. Midnight is not a whole number of multiples of 86400 after Jan 1st 1970.
Isn't that an issue with the format you want to convert UNIX time to ?
I mean, UNIX time is quite clearly and unambiguously defined as the number of seconds that passed since January 1st 1970. How are UTC's leap seconds any relevant?
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Isn't that an issue with the format you want to convert UNIX time to ?
I mean, UNIX time is quite clearly and unambiguously defined as the number of seconds that passed since January 1st 1970. How are UTC's leap seconds any relevant?
It's not though. Unix time is not monotonic. It goes backwards sometimes.