Dear Dr Mahdi H. Miraz,

As far as I know, these types of websites operate on a national basis, i.e., usually on these websites, scientific conferences are planned in a given country. I do not know this type of site with a global reach. Research Gate sometimes offers information about planned scientific conferences. Because the Research Gate portal is a global portal, you can search for scientific conferences on this site, which are also to be held in another country on another continent. To find them just use the search function on this portal. In addition, some of the pages of the indexation of scientific publications also allow posting such information about planned events in the world of science.

I invite you to the discussion.

Best wishes.

Here are some. As far as I know these websites are referred to by some international organizations which are concerned with scholarly issues:

https://www.cfplist.com/

http://www.wikicfp.com/cfp/

https://networks.h-net.org/h-announce

Best

Nowadays, finding international conferences is one of the easiest jobs. You can easily find many conference alerts websites on the internet. Many Conference alerts websites is there.

https://internationalconferencealerts.com

https://allconferencealert.net

https://conferencealerts.co.in

https://conferencenext.com