diff --git a/CHANGELOG.md b/CHANGELOG.md
index 701bb86ea4..44290c1dd2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add some quote to 'printGoodbye' [#997](https://github.com/ie3-institute/simona/issues/997)
 - Add unapply method for ThermalHouseResults [#934](https://github.com/ie3-institute/simona/issues/934)
 - Added `ApparentPower` to differentiate between different power types [#794](https://github.com/ie3-institute/simona/issues/794)
+- Update/enhance config documentation [#1013](https://github.com/ie3-institute/simona/issues/1013)
 
 ### Changed
 - Adapted to changed data source in PSDM [#435](https://github.com/ie3-institute/simona/issues/435)
diff --git a/docs/readthedocs/config.md b/docs/readthedocs/config.md
index 45deee0778..f6e968659a 100644
--- a/docs/readthedocs/config.md
+++ b/docs/readthedocs/config.md
@@ -12,15 +12,13 @@ To create the output directory name, the name of the simulation is used as a str
   `simona.simulationName = "vn_simona"`
 
 ### Time parameters
-Starting date and time of the simulation
-  - Format: "YYYY-MM-DD HH:MM:SS"
+Starting date and time of the simulation in ISO-8601 date and time format with offset
 
-  `simona.time.startDateTime = "2011-01-01 00:00:00"`
+  `simona.time.startDateTime = "2011-01-01T00:00:00Z"`
 
-Ending date and time of the simulation
-  - Format: "YYYY-MM-DD HH:MM:SS"
+Ending date and time of the simulation in ISO-8601 date and time format with offset
 
-  `simona.time.endDateTime = "2011-01-01 02:00:00"`
+  `simona.time.endDateTime = "2011-01-01T02:00:00Z"`
 
 The preset ReadyCheckWindow should be maintained 
 
@@ -39,7 +37,9 @@ Setting of the data source
 
   `simona.input.grid.datasource.id = "csv"`
 
-Specify the folder path containing the csv data of the grid components and the csv separator (e.g. "," or ";")
+Specify the folder path containing the csv data of the grid components and the csv separator (e.g. "," or ";").
+The directory structure is determined by the boolean `isHierarchic`. 
+If files are placed within [a specific set of subdirectories](https://powersystemdatamodel.readthedocs.io/en/latest/io/csvfiles.html#default-directory-hierarchy), `isHierarchic: true` needs to be set.
 
 ```
 simona.input.primary.csvParams = {