Set value to a date time variable on saving a date field

Hi All,
I have a scenario where there is a date field and once a date is entered, a date and time field should replace a date field with a defaulted time and the date.
If I remove either date or time in the date time field, it should again go back to a empty date field. Following is the code

load(
local!dt1,
local!dtTm1,
if(isnull(local!dt1),
a!dateField(
label:"date",
value:todate(local!dt1),
saveInto:{local!dt1,a!save(local!dtTm1,gmt(todatetime(save!value & " " & "16:00")))}
),
a!dateTimeField(
label:"dateTime",
value:todatetime(local!dtTm1),
saveInto:{local!dtTm1,local!dt1}
)
)



)




But when I again enter a date in the date field, the date and time field populates with a previously entered date and time instead of current chosen one. Is there any other way to implement this?

Thanks in advance.

OriginalPostID-251525