Project Server, I have a project information like project name , start date, end date.
Anyone can point me out to the right direction?
You can use the REST API of Project Server. Any project has an attribute called "FinishDate", so you only need to set the filter like this one:
https://<SP URL>/<PWA Site/_api/ProjectServer/Projects?$filter=FinishDate le datetime'2019-11-07T17:23:00.000Z'&$select=FinishDate,Name,StartDate