The ramifications of missing a due date can range from simply adjusting the date to getting fired. Don't take chances with deadlines when a simple conditional format can remind you.

You can change the date & time format in Google Sheets & Excel Online using this guide. Use different date & time formats in spreadsheets.

The problem is that the minimum bounds are represented by a number, and the dates here are using the Short Date format. Luckily, Excel allows us to easily convert dates into their numerical values.