Timesheet Details Rows - Auto Generate Monthly List of Days

Hi,

Previously, employees were used to filling up an Excel Spreadsheet with From/To Dates already in monthly list.
When next month comes, they just copy that sheet, enters the 1st of the month, and “drag” the cell down to automatically obtain a list of days in sequence for that month.
I am not asking for the exact functionality, rather a workaround.

Is there a way to customise the Timesheet Details Doctype such that it starts with already 31 rows of one day each (9am - 6pm) of that month, for example?

Please advise.

Thanks.

Best Regards.