calculated field formulas in sharepoint

https://msdn.microsoft.com/en-us/library/office/bb862071(v=office.14).aspx

https://support.office.com/en-us/article/examples-of-common-formulas-in-sharepoint-lists-d81f5f21-2b4e-45ce-b170-bf7ebf6988b3

https://www.c-sharpcorner.com/UploadFile/5b1f04/get-a-month-only-from-date-time-column-in-sharepoint-2013-li/


https://www.c-sharpcorner.com/UploadFile/5b1f04/get-a-year-only-from-date-time-column-in-sharepoint/