fn unix_to_ymdhms(unix_secs: u64) -> (u32, u32, u32, u32, u32, u32)Expand description
Convert Unix epoch seconds to (year, month, day, hour, minute,
second) via a small pure-Rust algorithm. Avoids pulling in
chrono for this single-purpose use.
Accurate for any positive timestamp through year 9999. Returns
(1970, 1, 1, 0, 0, 0) for negative inputs (impossible in
practice since session timestamps are always now-ish).