I sent this as a feature request to Airtable support, but I thought I’d post here too. Perhaps there are other workarounds.
The workday_diff function doesn’t handle a blank value for the “holidays” argument. Currently a blank value causes an “#ERROR”
I’m using the workday_diff function to calculate my working days in a month. Here is a screenshot of a simple example of this:
Since not all months have days off, the function returns an error for those months.
My work around is to wrap the WORKDAY_DIFF in a IF: