usage: nap [-h] [--quiet] [--dry-run] [--poll-time] {for,until} ... time

Sleep tight :)

positional arguments:
  {for,until}
    for            Sleep for the given time
    until          Sleep until the given time
  time             Time values postfixed by their respective units separated
                   by nothing

optional arguments:
  -h, --help       show this help message and exit
  --quiet, -q      No output
  --dry-run, -0    Only output
  --poll-time, -p  Instead of sleeping the entire time, checks every second if
                   the given time has arriven.

Example:
    nap for 1h10m
    nap for 1s1m
    nap for 30s
    nap until 9h23m10s
    nap -q until 14h
    nap -0 until 9h23m10s