Only shows in UTC because timezones are bullshit and I needed to pick one. Sorry. It is what my servers use.

covidate

#!/usr/bin/env bash

main() {
  local -ri mar_end=1583042400
  local -ri today="$(date +"%s")"
  local -r  dow="$(date -u +"%a")"
  local -r  time="$(date -u +"%T")"
  local -ri secs=86400
  local -ri days_since="$(( ((${today} - ${mar_end}) / ${secs}) + 1 ))"

  echo "${dow} ${days_since} March 2020 ${time} UTC"
}

set -euo pipefail
main

Output looks like:

$ covidate
Sat 322 March 2020 21:21:20 UTC

Fixed so it should run on macOS thanks to lambdagrrl on Twitter.

date +%a gets you short day name, versus the case. available in both gnu and bsd date