Prompt Title: Date-based email reminder.

Yes, you can use Google Apps Script to send an email based on the date in a cell. Here's an example code snippet that you can modify to fit your specific needs:

javascriptCopy code
function sendEmailOnDate() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var startRow = 2; // Start checking for dates from row 2
  var numRows = sheet.getLastRow() - 1; // Number of rows to check
  var dataRange = sheet.getRange(startRow, 1, numRows, 1); // Range of dates to check
  var data = dataRange.getValues(); // Get values of the range

  var today = new Date(); // Get current date

  for (var i = 0; i < data.length; ++i) {
    var row = data[i];
    var date = new Date(row[0]); // Convert the cell value to a date object
    var diff = Math.floor((date - today) / (1000 * 60 * 60 * 24)); // Calculate the difference between the dates in days

    if (diff == 0) { // If the date in the cell is today
      var emailAddress = "[email protected]"; // Replace with the recipient's email address
      var subject = "Reminder: Event today";
      var message = "This is a reminder that there is an event today.";
      MailApp.sendEmail(emailAddress, subject, message);
    }
  }
}

To use this script, you'll need to create a trigger that runs it daily. Here's how:

1. In your Google Sheet, go to "Tools" > "Script editor".
2. Copy and paste the code above into the editor.
3. Modify the email address, subject, and message variables in the if (diff == 0) block to fit your specific needs.
4. Save the script and give it a name.
5. In the script editor, go to "Edit" > "Current project's triggers".
6. Click the "Add Trigger" button in the bottom right corner.
7. Set the function to "sendEmailOnDate".
8. Set the "Events" to "Time-driven".
9. Set the "Trigger type" to "Day timer".
10. Set the "Time of day" to a time that you want the script to run every day.
11. Click the "Save" button.

This trigger will now run the sendEmailOnDate function every day at the specified time and check if any cells in the specified range contain the current date. If a cell contains the current date, the function will send an email to the specified recipient with the specified subject and message.