Lukas

Current Year Shortcodes lets you insert the current year, month and day anywhere in your WordPress site with a simple shortcode.
Use the shortcode [Y] in any post, page or widget to display the current year.
<h3>How it works</h3>
[Y] – inserts the current year with four digits e.g. 2023 
[y] – inserts the current year with two digits e.g. 23 
[m] – inserts the current month with two digits e.g. 01 
[n] – inserts the current month without leading zeros e.g. 1 
[F] – inserts the current month as a text e.g. January 
[M] – inserts the current month with three letters e.g. Jan 
[d] – inserts the current day with two digits e.g. 06 
[j] – inserts the current day without leading zeros e.g. 6 
[D] – inserts the current day with three letters e.g. Mon 
[l] – inserts the current day as a text e.g. Monday

Current Year Shortcodes

Insert the current year, month and day with a shortcode in any page, post or widget of your WordPress site.

t1gr0u

The plugin allows to change theme (template) on desired dates. 
If you want a Christmas theme automatically on your blog just for 5 days (or more), the plugin will do it for you.
Just enter a start date, an end date , select times and the theme which you want to use, that’s it.
You can have as many combinations as you wish.
A theme for each seasons, halloween theme, christmas theme… or even a day and night theme…
<h3>Admin Panel</h3>
The admin panel will allow to move re-order your theme changes. 
Just remember that, the top is the lowest and the bottom is the highest level. 
So, if you have a theme change (‘theme1’) set for the 23/07 – 01/08 first and theme change (‘theme2’) for the 24/07 – 26/07, and today’s date is 24/07, 
‘theme2’ will be displayed unless you move down ‘theme1’.”
The rules, which you have created, will stay year on year.

WP Change Template

The plugin allows to change theme (template) on desired dates.

Current Year Shortcodes vs WP Change Template