diff --git a/Elwig/Helpers/Export/Ods.cs b/Elwig/Helpers/Export/Ods.cs
index 0c7560a..7513f42 100644
--- a/Elwig/Helpers/Export/Ods.cs
+++ b/Elwig/Helpers/Export/Ods.cs
@@ -127,6 +127,16 @@ namespace Elwig.Helpers.Export {
                   <style:style style:name="N5" style:family="table-cell" style:parent-style-name="default" style:data-style-name="NN5"/>
                   <number:number-style style:name="NN6"><number:number number:decimal-places="6" number:min-decimal-places="6" number:min-integer-digits="1" number:grouping="true"/></number:number-style>
                   <style:style style:name="N6" style:family="table-cell" style:parent-style-name="default" style:data-style-name="NN6"/>
+                  <number:date-style style:name="_date"><number:day number:style="long"/><number:text>.</number:text><number:month number:style="long"/><number:text>.</number:text><number:year number:style="long"/></number:date-style>
+                  <style:style style:name="date" style:family="table-cell" style:parent-style-name="default" style:data-style-name="_date"/>
+                  <number:time-style style:name="_time"><number:hours number:style="long"/><number:text>:</number:text><number:minutes number:style="long"/><number:text>:</number:text><number:seconds number:style="long"/></number:time-style>
+                  <style:style style:name="time" style:family="table-cell" style:parent-style-name="default" style:data-style-name="_time"/>
+                  <number:date-style style:name="_datetime">
+                   <number:day number:style="long"/><number:text>.</number:text><number:month number:style="long"/><number:text>.</number:text><number:year number:style="long"/>
+                   <number:text> </number:text>
+                   <number:hours number:style="long"/><number:text>:</number:text><number:minutes number:style="long"/><number:text>:</number:text><number:seconds number:style="long"/>
+                  </number:date-style>
+                  <style:style style:name="datetime" style:family="table-cell" style:parent-style-name="default" style:data-style-name="_datetime"/>
                  </office:automatic-styles>
                  <office:body>
                   <office:spreadsheet>
@@ -166,8 +176,8 @@ namespace Elwig.Helpers.Export {
                     await writer.WriteAsync($"""
                               <config:config-item-map-entry config:name="{tbl}">
                                <config:config-item config:name="VerticalSplitMode" config:type="short">2</config:config-item>
-                               <config:config-item config:name="VerticalSplitPosition" config:type="int">4</config:config-item>
-                               <config:config-item config:name="PositionBottom" config:type="int">4</config:config-item>
+                               <config:config-item config:name="VerticalSplitPosition" config:type="int">5</config:config-item>
+                               <config:config-item config:name="PositionBottom" config:type="int">5</config:config-item>
                               </config:config-item-map-entry>
 
                         """);
@@ -270,6 +280,15 @@ namespace Elwig.Helpers.Export {
             string c;
             if (data == null) {
                 c = $"<{ct}{add}/>";
+            } else if (data is DateOnly date) {
+                add = string.Join(' ', add.Split(' ').Select(p => p.StartsWith("table:style-name=") ? $"table:style-name=\"date\"" : p));
+                c = $"<{ct} office:value-type=\"date\" calcext:value-type=\"date\" office:date-value=\"{date:yyyy-MM-dd}\"{add}><text:p>{date:dd.MM.yyyy}</text:p></{ct}>";
+            } else if (data is TimeOnly time) {
+                add = string.Join(' ', add.Split(' ').Select(p => p.StartsWith("table:style-name=") ? $"table:style-name=\"time\"" : p));
+                c = $"<{ct} office:value-type=\"time\" calcext:value-type=\"time\" office:time-value=\"{time:\\P\\THH\\Hmm\\Mss\\S}\"{add}><text:p>{time:HH:mm:ss}</text:p></{ct}>";
+            } else if (data is DateTime dt) {
+                add = string.Join(' ', add.Split(' ').Select(p => p.StartsWith("table:style-name=") ? $"table:style-name=\"datetime\"" : p));
+                c = $"<{ct} office:value-type=\"date\" calcext:value-type=\"date\" office:date-value=\"{dt:yyyy-MM-dd\\THH:mm:ss}\"{add}><text:p>{dt:dd.MM.yyyy HH:mm:ss}</text:p></{ct}>";
             } else if (data is decimal || data is float || data is double || data is byte || data is char ||
                        data is short || data is ushort || data is int || data is uint || data is long || data is ulong) {
                 double v = double.Parse(data?.ToString() ?? "0");  // use default culture for ToString and Parse()!
@@ -281,7 +300,7 @@ namespace Elwig.Helpers.Export {
                         case "°KMW": n = 1; data = $"{v:N1}"; break;
                         case "°Oe": n = 0; data = $"{v:N0}"; break;
                     }
-                    if (n >= 0) add = string.Join(" ", add.Split(" ").Select(p => p.StartsWith("table:style-name=") ? $"table:style-name=\"N{n}\"" : p));
+                    if (n >= 0) add = string.Join(' ', add.Split(' ').Select(p => p.StartsWith("table:style-name=") ? $"table:style-name=\"N{n}\"" : p));
                 }
                 c = $"<{ct} office:value-type=\"float\" calcext:value-type=\"float\" office:value=\"{v.ToString(CultureInfo.InvariantCulture)}\"{add}><text:p>{data}</text:p></{ct}>";
             } else {