diff --git a/src/nc_date.jl b/src/nc_date.jl
index a0ad1e7..3a1f3d7 100644
--- a/src/nc_date.jl
+++ b/src/nc_date.jl
@@ -1,6 +1,6 @@
 nc_date(ds::NCdata) = ds["time"][:]
 
-function nc_date(file::NCfiles; period=nothing)
+function nc_date(file::AbstractString; period=nothing)
   nc_open(file) do ds
     dates = nc_date(ds)
     period === nothing && return dates
@@ -10,6 +10,10 @@ function nc_date(file::NCfiles; period=nothing)
   end
 end
 
+function nc_date(fs::Vector{<:AbstractString}; period=nothing)
+  map(f -> nc_date(f; period), fs) |> x -> vcat(x...)
+end
+
 function nc_calendar(file::AbstractString)
   nc_open(file) do ds
     # typeof(ds["time"][1])