There are almost every photo or image copyright on the Internet. If all these images are copied on your website. So for this you will be penalized as per the law. Because the owner of the image or person who has created it without using his permission. In this case, the owner needs permission to use it. If you do not do so, then your website may be able to eat peanuts from Google or the rank may be reduced.
This way you want to print a calendar for your organization. That's why if you want to put images / photos on Google's calendar as desired. If the copyright owner of that image suits your name or company. Then you have to pay compensation for it, it may even be jail.
For this reason, you can use copyright free photos to use on your business or website. It will not be a problem. Google will get many such copyright free images / photos. For this you have to search Google in a different way. This link will be searched by (click here). Enter the first box you want to search. See section ** Usage Rights ** named section box. Here ** Free to Use and Share ** Select the day.
If you want to share the image by modifying / editing the website, use the above Usage Rights section Free to Share and Modify. Search for the use of business for business purposes, search the place with Free to share, Modify and Commercially Use.
The website / business image itself is the best one. In this case, you can make attractive photos by making beautiful photos as attractive as you want. If you are a PC user, learn to create images using Photoshop software. In this case you will get a good tutorial on YouTube in Bengali. And if you use Android phone, you can create many types of images with a 4-digit ante (Photoeditor). Install from App Store (Playstore).