tps://learnbyexample.gumroad.com/l/learnbyexample-weekly>learnbyexample weekly</a> newsletter, I use a script to generate a template issue. I use the arithmetic feature as shown below:<pre class=language-ruby data-lang=ruby style=background-color:#f5f5f5;color:#1f1f1f;><code class=language-ruby data-lang=ruby><span style=color:#7f8989;># prev_date variable gets the value from the previous newsletter issue
</span><span>$ prev_date=</span><span style=color:#d07711;>'2024-02-23'
</span><span>$ date </span><spa