> brew audit --new-formula byrthdays
byrthdays:
* GitHub repository not notable enough (<20 forks, <20 watchers and <50 stars)
* GitHub repository too new (<30 days old)
Error: 2 problems in 1 formula

> byrthdays -h

Byrthdays is a tool to list people with birthdays from your macOS contacts.

Usage:
  byrthdays [-d <days>] [-o <pretty|json|xml|csv>] [-t <size>] [-g]

Options:
  -d  extract only birthdays within the given number of days (default 14; -1 for all)
  -o  to set the output format. Can be either 'pretty', 'json', 'xml' or 'csv' (default 'pretty')
  -t  to set the maximum thumbnail width/height of the contact images. It only prints the base64 encoded thumbnail data (PNG) when this option is used
  -g  to create grayscale thumbnails. Only in combination with '-t'
  -h  prints this help

byrthdays v1.0.8
Oliver Fürniß, 07/07/2018
Website: https://github.com/olfuerniss/byrthdays