How do I automatically send an email when it is 30 days past a date in a column?

Club Peck

Mike TV

@Club Peck

Here's one way of doing it.

Target Date is manually entered.

# Days Elapsed is a column formula:

=NETDAYS([Target Date]@row, Today@row)

Today column is recorded via an Automation:

Another automation sends the email when 30 days is reached:

You can change "Is equal to" to "Is greater than or equal to" if you want it to keep notifying more than once.

The reason you create an Automation to record today's date (instead of using the TODAY() function as part of a formula) is so that things will still work even if the sheet isn't manually opened. It will still work even if nobody is using the sheet that day.