How to create an empty TimeArray

How could I create an empty Time Array?
I would like to “vcat” a few TimeArrays using for loop, but I would need an empty TimeArray to initialize the for loop. May I know how could I do that?

Why do you need an emtpy one? Can’t you just do

ta_all = ta_first 

for ta in list_of_other_time_arrays
    ta_all = vcat(ta_all, ta)

or indeed just reduce(vcat, list_of_time_arrays)?