In my military service, i was helping people in vaccination center. The days and time where i was on duty, were given to me in excel. So i would find a way to have this excel calendar to my google calendar.
HTML,JS,CSS
I don't have design ideas so i used this codeopen for the file upload https://codepen.io/kbocz/pen/vbBEBN
https://unpkg.com/[email protected]/bundle/read-excel-file.min.js
The project is for specific type of excel, so if you want the same result, you should take another data. Also, you should make an app on google cloud platform and enable calendar API