Uploading variable rates via spreadsheet does not recognize the start date.

Summary:

Content (required):

I'm loading variable rates via standard spreadsheet. "prepare in workbook" button on the Variable Rates Profiles page. The data is successfully loaded, however the spreadsheet always loads the system date. I want to load with the effective start date of 1951-01-01.

Does anyone have a tip?

Version (include the version you are using, if applicable):

22C

Code Snippet (add any code snippets that support your topic, if applicable):