This is working, and makes fast to generate a time stamp, several format can be chosen (yyyy-MM-dd HH:mm:ss for instance). You can apply a style (but only the ones GDrive has) for your date, and you can even change the font, but only after having pasted the date (cannot be made in the settings). But: There's no help to choose the time zone (you have to enter something, but you don't know if it's right), and you cannot have the day of the week in other language. It would be interesting to have it. You cannot put a prefix, like année:YYYY, or anything that is not in a regular date format. And you can't have 2 predefined format, one with the hours, and one without the hours. It would be nice to customize several format, and have it memorized, not only the current one. It's useful, but some other functionality for non-English users could be added, and should be added, and more customizations for the date format.