Beltalowda

  #!/bin/sh
  #
  # Sleep until a specific time. This takes a time in 24-hour clock format and
  # sleeps until the next instance of this time is reached.
  #
  #   % sleep-until 15:30:45
  #   % sleep-until 15:30      # Until 15:30:00
  #   % sleep-until 15         # Until 15:00:00
  #
  # Or to sleep until a specific date:
  #
  #   % sleep-until 2023-01-01T15:00:00
  #
  # Or space instead of T; can abbreviate time like above.
  echo " $@" | grep -q -- ' -h' && { sed '1,2d; /^[^#]/q; s/^# \?//;' "$0" | sed '$d'; exit 0; }  # Show docs

    % sleep-until -h
    Sleep until a specific time. This takes a time in 24-hour clock format and
    sleeps until the next instance of this time is reached.
    …