Insert Date Time

DateTime

/**
 * The onOpen function runs automatically when the Google Docs document is
 * opened. Use it to add custom menus to Google Docs that allow the user to run
 * custom scripts. For more information, please consult the following two
 * resources.
 *
 * Extending Google Docs developer guide:
 *     https://developers.google.com/apps-script/guides/docs
 *
 * Document service reference documentation:
 *     https://developers.google.com/apps-script/reference/document/
 */
function onOpen() {
  // Add a menu with some items, some separators, and a sub-menu.
  DocumentApp.getUi().createMenu('Utilities')
      .addItem('Insert Date', 'insertAtCursor')
      .addItem('Insert Time', 'insertTimeAtCursor')
      .addItem('Insert Long Date', 'insertLDateAtCursor')
      .addItem('Insert Date and Time', 'insertDTAtCursor')
      .addItem('Insert Custom Long Date and Time', 'insertCLDTAtCursor')
      .addToUi();
  
}

/**
 * Inserts the date at the current cursor location in boldface.
 */
function insertAtCursor() {
  var cursor = DocumentApp.getActiveDocument().getCursor();

  if (cursor) {
    // Attempt to insert text at the cursor position. If insertion returns null,
    // then the cursor's containing element doesn't allow text insertions.
    var date = Utilities.formatDate(new Date(), "GMT", "yyyy-MM-dd"); // "yyyy-MM-dd'T'HH:mm:ss'Z'"
    var element = cursor.insertText(date);
    if (element) {
      element.setBold(true);
    } else {
      DocumentApp.getUi().alert('Cannot insert text at this cursor location.');
    }
  } else {
    DocumentApp.getUi().alert('Cannot find a cursor in the document.');
  }
  moveCursorToEnd();
}
/**
 * Inserts the time at the current cursor location in boldface.
 */
function insertTimeAtCursor() {
  var cursor = DocumentApp.getActiveDocument().getCursor();

  if (cursor) {
    // Attempt to insert text at the cursor position. If insertion returns null,
    // then the cursor's containing element doesn't allow text insertions.
    var time = Utilities.formatDate(new Date(), "GMT", "HH:mm:ss"); // "yyyy-MM-dd'T'HH:mm:ss'Z'"
    var element = cursor.insertText(time);
    if (element) {
      element.setBold(true);
    } else {
      DocumentApp.getUi().alert('Cannot insert text at this cursor location.');
    }
  } else {
    DocumentApp.getUi().alert('Cannot find a cursor in the document.');
  }
  moveCursorToEnd();
}
/**
 * Inserts the long date at the current cursor location in boldface.
 */
function insertLDateAtCursor() {
  var cursor = DocumentApp.getActiveDocument().getCursor();

  if (cursor) {
    // Attempt to insert text at the cursor position. If insertion returns null,
    // then the cursor's containing element doesn't allow text insertions.
    var longDate = Utilities.formatDate(new Date(), "GMT", "MMMM dd, yyyy"); // "yyyy-MM-dd'T'HH:mm:ss'Z'"
    var element = cursor.insertText(longDate);
    if (element) {
      element.setBold(true);
    } else {
      DocumentApp.getUi().alert('Cannot insert text at this cursor location.');
    }
  } else {
    DocumentApp.getUi().alert('Cannot find a cursor in the document.');
  }
  moveCursorToEnd();
}

/**
 * Inserts the Date and time at the current cursor location in boldface.
 */
function insertDTAtCursor() {
  var cursor = DocumentApp.getActiveDocument().getCursor();

  if (cursor) {
    // Attempt to insert text at the cursor position. If insertion returns null,
    // then the cursor's containing element doesn't allow text insertions.
    var longDateTime = Utilities.formatDate(new Date(), "GMT", "MMMM dd, yyyy HH:mm"); // "yyyy-MM-dd'T'HH:mm:ss'Z'"
    var element = cursor.insertText(longDateTime);
    if (element) {
      element.setBold(true);
    } else {
      DocumentApp.getUi().alert('Cannot insert text at this cursor location.');
    }
  } else {
    DocumentApp.getUi().alert('Cannot find a cursor in the document.');
  }
  moveCursorToEnd();
}

/**
 * Inserts the custom long date and time at the current cursor location in boldface.
 */
function insertCLDTAtCursor() {
  var cursor = DocumentApp.getActiveDocument().getCursor();

  if (cursor) {
    // Attempt to insert text at the cursor position. If insertion returns null,
    // then the cursor's containing element doesn't allow text insertions.
    var customLDateTime = Utilities.formatDate(new Date(), "GMT", "EEEE, MMMM dd, yyyy- HH:mm'hrs'"); // "yyyy-MM-dd'T'HH:mm:ss'Z'"
    var element = cursor.insertText(customLDateTime);
    if (element) {
      element.setBold(true);
    } else {
      DocumentApp.getUi().alert('Cannot insert text at this cursor location.');
    }
  } else {
    DocumentApp.getUi().alert('Cannot find a cursor in the document.');
  }
  moveCursorToEnd();
}

function moveCursorToEnd() {
  //move cursor to the end
  var doc=DocumentApp.getActiveDocument();
  var txtElement=doc.getCursor().getElement();
  var txtOffset=doc.getCursor().getOffset();
  var position=doc.newPosition(txtElement, txtOffset + 1);
  doc.setCursor(position);
}

Thanks for letting me know, @angeldeniz11235 !

great script. a few questions

1. Can we remove the bold text to regular?
2. How can we change to 12hr clock?
3. Is it possible to add keyboard shortcuts to a utility function?

This script works well except that I seem to be missing something in trying to get the GMT offset.

I change the line that shows "GMT" to "GMT-05:00" but it does not give the offset in my timestamp. Any ideas?

@budreaux

Instead of "GMT-05:00" try "GMT-5"

I wanted to add the word "GMT" or "UTC" and put the date or time in a bracket. How to do that?