Calculate date and time at a specific point in a survey

Dear Team,

I would like to automatically at the back end calculate time and date when one reaches a particular point in my survey. I don’t want my enumerators to input this but rather collect the data automatically through a calculation process. My survey could be in three sections so after every section I want to automatically calculate the date and time for comparison purposes among enumerators conducting the survey. How can I go about this.
I once read somewhere that I could use calculate_here as question type with once(format-date-time(now(), ‘%Y-%b-%e %H:%M:%S’))" in its calculation column but this doesn’t work for me. The calculate_here is not recognizable question type. Kindly help whoever has a solution.

Welcome back to the community, @rigs! This post discussed previously should help you solve your issue: