Your comments

Hi 

Ok so It seems that you will need to write a script to integrate with the hebcal rest API. 

It would be a bit out of the scope of this thread to try and  explain how to integrate with rest API's with no development skills. 

I recommend you seek a developer to do this job for you. 

This is the REST API resource: 

https://www.hebcal.com/home/219/hebrew-date-converter-rest-api

What do you mean by "with Excel" ?