Show content when date is between dates 25th and 15th

General information for the website: Wordpress-website
Description of requirements/features: I need a php-code to echo content when the date is between the dates 25th and 15th. Instead of having to add the dates manually for each upcoming period, i'd like the php code to automatically check for the period instead.

The code I use currently, that I have to change manually each period, looks like this:


---php
$now = new DateTime();
$startdate = new DateTime("2017-01-25");
$enddate = new DateTime("2017-02-15");

if($startdate <= $now && $now <= $enddate) {
echo 'Yes';
}else{
echo "No";
}
---


For example:
If today would be the 24th of the month, that is not between the 25th and 15th - so the content will be the else-line "no".

If today would be the 12th of the month - the content would echo the first line "yes"
Extra notes: