I was kindly shown how to have a checkbox ticked if the created day or a record was the previous working day (not including weekends), I would now like to adapt this so the checkbox is ticked if the created date is greater or equal to the last working day (not including weekends) but less than today.

The previous post is here:

https://developer.salesforce.com/forums/ForumsMain?id=9060G000000BcNo

Thanks in advance.