If you’re already in a country where the dates are formatted in DD/MM/YYYY, you wouldn’t need to use the DATETIME_PARSE part of the function, but to avoid any ambiguity whatsoever (regardless of country), you would want to use the DATETIME_PARSE function.
Hope this helps! If this answers your question, could you please mark this comment as the solution to your question? This will help other people who have a similar question.
Welcome to the community, @Florence_Dorsile!
The list of functions that you can use in Airtable is on this page:
In your case, you would use the IS_BEFORE function (and optionally, the DATETIME_PARSE function):
If you’re already in a country where the dates are formatted in DD/MM/YYYY, you wouldn’t need to use the DATETIME_PARSE part of the function, but to avoid any ambiguity whatsoever (regardless of country), you would want to use the DATETIME_PARSE function.
Hope this helps! If this answers your question, could you please mark this comment as the solution to your question? This will help other people who have a similar question.