Time Peroid in custom form

Hello,
I’m using custom form to add and edit entries.
My question is there any way to add Time peroid label from orginal lightbox to custom one?

Or the only way is to create few select’s and join them in JS to achiev this format start_date 2010-09-28 07:20?

What do you mean by "add Time peroid label "
You can get start and end date as text strings easily.
If you need to get the collection of inputs - things are more complicated. Form elements are not purposed to be used onside of default lightbox, so while it possible to get the same html by calling render() method of related form block, methods which are used to get|set values can’t be used outside of lightbox.