Show a date X number of days before today's date on Storyline - is this possible?

Hi Tina, you can try this code:

var currentDate = new Date();

var fifteenDaysAgo = new Date(currentDate);
fifteenDaysAgo.setDate(currentDate.getDate() - 15);

// Format the date
var formattedDate = (fifteenDaysAgo.getMonth() + 1) + '/' + fifteenDaysAgo.getDate() + '/' + fifteenDaysAgo.getFullYear();

var player = GetPlayer();
player.SetVar("YourVariableName", formattedDate);

// you'll need a text variable titled "YourVariableName" in SL 

Hi Danielle,

I think it is is because, for UK format, you need to ensure that the day and month are always two digits. I don't know how your modified script looks like but here is the code to properly show UK format with additional four more dates showing XX number of days in the past. I also attached .story file for a reference. 

// Function to format date in DD/MM/YYYY for UK format
function formatDateUK(date) {
  const day = String(date.getDate()).padStart(2, '0');
  const month = String(date.getMonth() + 1).padStart(2, '0');
  const year = date.getFullYear();
  return `${day}/${month}/${year}`;
}

// Function to set Storyline variable with formatted date
function setStorylineVariable(variableName, daysAgo) {
  const currentDate = new Date();
  const pastDate = new Date(currentDate.setDate(currentDate.getDate() - daysAgo));
  const formattedDate = formatDateUK(pastDate);

  const player = GetPlayer();
  player.SetVar(variableName, formattedDate);
}

// Set Storyline variables for different days ago
setStorylineVariable("fifteen", 15);
setStorylineVariable("twenty", 20);
setStorylineVariable("thirtyfive", 35);
setStorylineVariable("fifty", 50);