Function timestamp_calc 

pub fn timestamp_calc(query: &str) -> String

Unix timestamp converter — offline replacement for epoch.now.sh / unixtimestamp.com.

Commands: (bare) / now — current time in all formats — decode Unix timestamp (auto-detects ms when >10^10) now + d/h/m/s — future relative timestamp now - d/h/m/s — past relative timestamp YYYY-MM-DD [HH:MM:SS] — date string to Unix timestamp