I am trying to find a workaround since Zoho has yet to give us a time only field or a way to completely remove the seconds from time. Hopefully someone can provide an assist. 

I have a main form with start and end date-time fields. 

I have a subform with one date-time field. 

When I click "Add New" on my subform, I want it to be populated with the start_time field. This would at least save my user the time of having to put in the date and 00 seconds again.