This bash script outputs a timestamp of the current time useful for time-dependent filenames, logging statements. etc.

timestamp.sh

#!/usr/bin/bash
#
# This function is meant to be defined or included in a file automatically
# sourced by the shell on startup, such as the ~/.bashrc file.
#
# Once this function is sourced, it can be called like any other bash function,
# and the output looks something like the following.
#
#   2023-05-24-18:03:09.368078818
#
# TODO(jflopez): Print the timestamp using the current locale's timezone.
function timestamp() {
  date "+%Y-%m-%d-%H:%M:%S.%N"
}