I am using LibreOffice version 4.4.5.2 and Windows 7 Ultimate. In Calc, I need to reprint an invoice.

How do I keep the original date from changing to the current date?

If you have used the formula =NOW()in a cell the current date will be inserted. Every time you open the spreadsheet the cell will be updated with the current date. You need to put a fixed date in the cell if you want it to be kept at that date.