Changing CSV character encoding, preserving IDs, and standardizing dates

You received a CSV, but the Japanese characters are not displaying correctly. When you open it in Excel, the leading zeros in ...

Fixed-length file column mismatch: A checklist to distinguish between character count, byte count, and line breaks

You are told that "the line length is incorrect," yet it looks the same on your screen.No matter how many times you reopen it, nothing changes, and you become unable to determine whether changing the ...