David Gewirtz

adiant

This plugin provides the <code>[iagc]</code> shortcode, which can be inserted on a WordPress Page or Post to display the official Copyright notice, a C with a circle around it (“©”) required legally in many countries to protect (“copyright”) many forms of intellectual property.
The <code>[iagy]</code> shortcode displays the current year. To display the Copyright symbol followed by the current year, use the <code>[iagcy]</code> shortcode.
Although not required in a Copyright notice, the <code>[iagm]</code> shortcode displays the name of the current month and the <code>[iagd]</code> shortcode displays the current day of the month.
Note that the day, month and year are truly Current, accurate to the moment the Page or Post is displayed, based on the Timezone set in WordPress General Settings.
To provide compatibility with previous Versions of this plugin, the <code>[c]</code>, <code>[y]</code>, <code>[cy]</code>, <code>[m]</code> and <code>[d]</code> shortcodes will still work, but one or more of them will be disabled if any other activated plugin or theme defines the same shortcode, so as not to interfere with that other plugin or theme.
<a href="https://installactivatego.com/copyright-shortcodes/" title="InstallActivateGo.com Copyright Current Date Shortcodes" rel="nofollow ugc">Click here</a> for examples of the shortcodes and an explanation of their use to create valid U.S.A. Copyright Notices.

InstallActivateGo Copyright Current Date Shortcodes

Provides Shortcodes to display the Copyright symbol and Current Year, Month and Day.

miniweblab

The easiest way displaying current year and copyright symbol and since year in your copyright footer text or wherever else you like on your site. 
Just use shortcodes [Y] for current year and [C] for copyright symbol after plugin activation.
If you need to display the current year, and have it always kept up to date, inserting this plugin’s [y] or [y] shortcode anywhere on your web site will do just that.
If you need to display an official Copyright notice, inserting this plugin’s [C] or [c] shortcode provides the official C with a circle around it (“©”) required legally in many countries to Copyright many forms of intellectual property.
Other shortcodes of this plugin: 
* Use [cy] or [CY] to display copyright symbol © and the current year together. 
* Use [cc] or [CC] to display copyright symbol © and the word “Copyright”. 
* Use [csy since=”2016″] to display the symbol of copyright, first year and current year (Assuming it is currently the year 2019 ex. © 2016-2019). 
* Use [ccsy since=”2016″] to display the symbol of copyright (©) and the word “Copyright”, first year and current year (Assuming it is currently the year 2019 ex. © Copyright 2016-2019).

Snappy Year Shortcode

The easiest way displaying current year, copyright symbol and since year with shortcode.

InstallActivateGo Copyright Current Date Shortcodes vs Snappy Year Shortcode