emacs - Inserting timestamps in files

org-time-stamp C-c .

will insert a date without a timestamp at point, though Org will still prompt you for a time (with the default being the current time).

How to insert date with a timestamp?

Use the prefix C-u for org-time-stamp

C-u C-c .

Use ! instead of . if you want the timestamp to be inserted in square brackets instead of arrow brackets.