Date/time CLI utility
dtg [-V|--version] [-h|--help] [-z TZ] [-f FORMAT] [TIMESTAMP]
Item | Description | Default
------------------|---------------------------|--------------------------
-V
, --version
| Print banner with version |
-h
, --help
| Print usage |
-z TZ
| Timezone[^1] | UTC
-f FORMAT
| Strftime format[^2] | %Y-%m-%dT%H:%M:%SZ
[^3]
-a
| Use custom format[^4] |
TIMESTAMP
| Timestamp SECONDS[.NS]
| now
except the last line is repeated for the given timezone and the
top three lines are in UTC