It's like you edited one code file in a project, and you want everyone to switch to night IDE theme when they open that particular file.
When you type eg "4/4", "4-Apr", "2025-04-04" or whatever, it is converted to a number based on your local date format. The cell has a date format applied to it so that the number appears as a date. If you send the sheet to someone else, it will display the same numeric value, using their settings to display it as a date.
maybe writing a Makefile (which afaik really REALLY wants tabs), and want to ensure someone's IDE doesn't change it to spaces.
At the same time, we're clearly shooting ourselves in the foot by using Excel for this. This feature is just a hodge-podge solution to the problem of Excel not having strict data types. There should be enough cautionary tales (https://eusprig.org/research-info/horror-stories/) for everyone to know to avoid Excel.
