handle fractional and NaN epochs (#4289)

* handle fractional and NaN epochs

* typo & linting

* fix style

* use today()

* fix stylecheck

* remove redundant string()

* move formatter changes to RecipesPipeline

* Apply suggestions from code review

change formatter-variable

Co-authored-by: Simon Christ <SimonChrist@gmx.de>

* add name to contributors

Co-authored-by: Henning Labuhn <henning.labuhn@depixus.com>
Co-authored-by: Simon Christ <SimonChrist@gmx.de>

.zenodo.json

@@ -720,6 +720,10 @@
         {
             "name": "Nick OBrien",
             "type": "Other"
+        },
+        {
+            "name": "Henning Labuhn",
+            "type": "Other"
         }
     ],
     "upload_type": "software"

src/backends/plotly.jl

@@ -532,11 +532,11 @@ plotly_native_data(axis::Axis, a::Surface) = Surface(plotly_native_data(axis, a.
 
 function plotly_convert_to_datetime(x::AbstractArray, formatter::Function)
     if formatter == datetimeformatter
-        map(xi -> replace(formatter(xi), "T" => " "), x)
+        map(xi -> isfinite(xi) ? replace(formatter(xi), "T" => " ") : missing, x)
     elseif formatter == dateformatter
-        map(xi -> string(formatter(xi), " 00:00:00"), x)
+        map(xi -> isfinite(xi) ? replace(formatter(xi), "T" => " ") : missing, x)
     elseif formatter == timeformatter
-        map(xi -> string(Dates.Date(Dates.now()), " ", formatter(xi)), x)
+        map(xi -> isfinite(xi) ? string(Dates.today(), " ", formatter(xi)) : missing, x)
     else
         error(
             "Invalid DateTime formatter. Expected Plots.datetime/date/time formatter but got $formatter",