julia> using ArgParse, Dates

julia> s = ArgParseSettings();

julia> @add_arg_table s begin
           "--foo"
           arg_type = Second
           default = Minute(1)
       end
ERROR: typeof(default)=Minute is incompatible with arg_type=Second)
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:35
 [2] check_default_type(default::Minute, arg_type::Type)
   @ ArgParse ~/.julia/packages/ArgParse/bylyV/src/settings.jl:501
 [3] add_arg_field!(settings::ArgParseSettings, name::Union{Vector{T}, T} where T<:AbstractString; desc::Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}})
   @ ArgParse ~/.julia/packages/ArgParse/bylyV/src/settings.jl:1055
 [4] top-level scope
   @ ~/.julia/packages/ArgParse/bylyV/src/settings.jl:841

julia> @add_arg_table s begin
           "--foo"
           arg_type = Second
           default = convert(Second, Minute(1))
       end;