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The "Datetime More Widget" module solves 3 problems:
1. Allows the user to independently specify the minimum and maximum year 0001-9999. (In the datetime module, the year selection is limited to 1900-2050)
2. Allows the user to use the Select list or Number field to enter date and time values.
3. Adds input for seconds (Seconds were missing from the datetime widget).

Features

The module adds a date and time input widget with an extended date range.
This can be useful for scientific, historical, and astronomical projects.

Post-Installation

Select the "Select list Datelist more" widget for your datetime field at the "Manage form display" page.

Similar projects

https://www.drupal.org/project/yearonly
https://www.drupal.org/project/drupal/issues/2840185
https://www.drupal.org/project/drupal/issues/2840220

Project information

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