Customize the Time format in lightbox

Hi ,
My start_date , end_date format is “%Y-%m-%d %H:%i:%s”. My project need to show the time format to seconds. I have config the following:

scheduler.config.xml_date="%Y-%m-%d %H:%i:%s";

and"%Y-%m-%d %H:%i:%s");

After These configurations can show the data time format correctly:

But the default lightbox for Time Period can only show to minutes

How can I modify the lightbox to add a drop-down list for seconds to read and write my time period?

scheduler does not work with seconds, minute is considered as minimal time unit. Select for seconds can’t be added to the time control.
I think the only solition is to implement custom time selector, you may try copying code of the default one and modify it for your needs