diff --git a/oox/source/drawingml/textfield.cxx b/oox/source/drawingml/textfield.cxx
index 1c9641996cdd..4c9c7a1f2926 100644
--- a/oox/source/drawingml/textfield.cxx
+++ b/oox/source/drawingml/textfield.cxx
@@ -215,7 +215,9 @@ SvxDateFormat TextField::getLODateFormat(std::u16string_view rDateTimeType)
     if( aDateTimeNum.empty() ) // "datetime"
         return SvxDateFormat::StdSmall;
 
-    int nDateTimeNum = o3tl::toInt32(aDateTimeNum);
+    // "datetimeFigureOut", which is what PowerPoint writes in a date placeholder, is an alias of
+    // datetime1: MS-OI29500 part 1, 21.1.2.2.4 (fld).
+    int nDateTimeNum = aDateTimeNum == u"FigureOut" ? 1 : o3tl::toInt32(aDateTimeNum);
 
     switch( nDateTimeNum )
     {
diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index 3a0ae204f8d9..662c14e8b69b 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -3031,6 +3031,12 @@ OUString DrawingML::GetFieldValue( const css::uno::Reference< css::text::XTextRa
                     rXPropSet->getPropertyValue(UNO_TC_PROP_NUMFORMAT) >>= nNumFmt;
                     aFieldValue = GetDatetimeTypeFromDate(static_cast<SvxDateFormat>(nNumFmt));
                 }
+                else if(aFieldKind == "DateTime")
+                {
+                    // The date/time field of a header/footer area carries no format of its own -
+                    // the page holds it - and "datetime" seems a perfect fit (see MS-OI29500).
+                    aFieldValue = u"datetime"_ustr;
+                }
                 else if(aFieldKind == "ExtTime")
                 {
                     sal_Int32 nNumFmt = -1;
diff --git a/sd/qa/unit/data/pptx/master-and-eleven-layouts.pptx b/sd/qa/unit/data/pptx/master-and-eleven-layouts.pptx
new file mode 100644
index 000000000000..5aeb1b84969a
Binary files /dev/null and b/sd/qa/unit/data/pptx/master-and-eleven-layouts.pptx differ
diff --git a/sd/qa/unit/export-tests-ooxml4.cxx b/sd/qa/unit/export-tests-ooxml4.cxx
index 243fe59eb801..7719784cad05 100644
--- a/sd/qa/unit/export-tests-ooxml4.cxx
+++ b/sd/qa/unit/export-tests-ooxml4.cxx
@@ -2450,6 +2450,21 @@ CPPUNIT_TEST_FIXTURE(SdOOXMLExportTest4, testCool16078_placeholderKeepsItsOutlin
     assertXPath(pLayout, "//p:sp[p:nvSpPr/p:nvPr/p:ph/@type='pic']/p:spPr/a:prstGeom", 0);
 }
 
+CPPUNIT_TEST_FIXTURE(SdOOXMLExportTest4, testCool16079_dateTimeField)
+{
+    // Given a deck whose date placeholders hold an automatically updated date:
+    createSdImpressDoc("pptx/master-and-eleven-layouts.pptx");
+    save(TestFilter::PPTX);
+
+    // The placeholder keeps a field. Without the fix it held our own display string as literal
+    // text, so PowerPoint showed "<date/time>" where the original showed a date. The type is the
+    // one that leaves the format to the reader, which is what a field holding none asks for - the
+    // alias PowerPoint writes here stands for a fixed MM/DD/YYYY.
+    xmlDocUniquePtr pLayout = parseExportedLayoutNamed(u"Title Slide");
+    assertXPath(pLayout, "//p:sp[p:nvSpPr/p:nvPr/p:ph/@type='dt']/p:txBody/a:p/a:fld", "type",
+                u"datetime");
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
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