This missing feature has been patched by Contao https://github.com/contao/core/issues/8411 https://github.com/contao/core/blob/094e809e88a511f1e951565c0fd63eccdf7d1bb3/assets/mootools/core/1.5.1/mootools-more-uncompressed.js#L870 Original https://github.com/mootools/mootools-more/blob/master/Source/Types/Date.js#L238 Maybe you like to implement this patch in new versions. ## <bountysource-plugin> --- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/37076472-date-datepicker-does-not-replace-placeholder-n?utm_campaign=plugin&utm_content=tracker%2F22069&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F22069&utm_medium=issues&utm_source=github). </bountysource-plugin>