Date

Since epoch

gdate +%s
#+RESULTS:
1589548609

UTC

gdate -u
#+RESULTS:
Fri May 15 13:16:51 UTC 2020

Format

A 14-digit date with year, month, day, hour, minute, and second, as expected by migratus.

date +"%Y%m%d%H%M%S"
#+RESULTS:
20220405093410