diff --git a/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehavior.java b/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehavior.java
index b480ae8e..5345a53d 100644
--- a/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehavior.java
+++ b/qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehavior.java
@@ -39,13 +39,16 @@ import static com.kingsrook.qqq.backend.core.logging.LogUtils.logPair;
 
 
 /*******************************************************************************
- **
+ ** Field Display Behavior class for customizing the display values used
+ ** in date-time fields
  *******************************************************************************/
 public class DateTimeDisplayValueBehavior implements FieldDisplayBehavior<DateTimeDisplayValueBehavior>
 {
    private static final QLogger LOG = QLogger.getLogger(DateTimeDisplayValueBehavior.class);
 
    private String zoneIdFromFieldName;
+   private String fallbackZoneId;
+
    private String defaultZoneId;
 
    private static DateTimeDisplayValueBehavior NOOP = new DateTimeDisplayValueBehavior();
@@ -112,14 +115,35 @@ public class DateTimeDisplayValueBehavior implements FieldDisplayBehavior<DateTi
       {
          try
          {
-            Instant       instant       = record.getValueInstant(field.getName());
-            String        zoneId        = record.getValueString(zoneIdFromFieldName);
-            ZonedDateTime zonedDateTime = instant.atZone(ZoneId.of(zoneId));
+            Instant instant    = record.getValueInstant(field.getName());
+            String  zoneString = record.getValueString(zoneIdFromFieldName);
+
+            ZoneId zoneId;
+            try
+            {
+               zoneId = ZoneId.of(zoneString);
+            }
+            catch(Exception e)
+            {
+               ////////////////////////////////////////////////////////////////////////////////////////////////
+               // if the zone string from the other field isn't valid, and we have a fallback, try to use it //
+               ////////////////////////////////////////////////////////////////////////////////////////////////
+               if(StringUtils.hasContent(fallbackZoneId))
+               {
+                  zoneId = ZoneId.of(fallbackZoneId);
+               }
+               else
+               {
+                  throw (e);
+               }
+            }
+
+            ZonedDateTime zonedDateTime = instant.atZone(zoneId);
             record.setDisplayValue(field.getName(), QValueFormatter.formatDateTimeWithZone(zonedDateTime));
          }
          catch(Exception e)
          {
-            LOG.info("Error applying zoneIdFromFieldName DateTimeDisplayValueBehavior", logPair("table", table.getName()), logPair("field", field.getName()), logPair("id", record.getValue(table.getPrimaryKeyField())));
+            LOG.info("Error applying zoneIdFromFieldName DateTimeDisplayValueBehavior", e, logPair("table", table.getName()), logPair("field", field.getName()), logPair("id", record.getValue(table.getPrimaryKeyField())));
          }
       }
    }
@@ -132,16 +156,24 @@ public class DateTimeDisplayValueBehavior implements FieldDisplayBehavior<DateTi
    @Override
    public List<String> validateBehaviorConfiguration(QTableMetaData tableMetaData, QFieldMetaData fieldMetaData)
    {
-      List<String> errors = new ArrayList<>();
-      String errorSuffix = " field [" + fieldMetaData.getName() + "] in table [" + tableMetaData.getName() + "]";
+      List<String> errors      = new ArrayList<>();
+      String       errorSuffix = " field [" + fieldMetaData.getName() + "] in table [" + tableMetaData.getName() + "]";
 
       if(!QFieldType.DATE_TIME.equals(fieldMetaData.getType()))
       {
          errors.add("A DateTimeDisplayValueBehavior was a applied to a non-DATE_TIME" + errorSuffix);
       }
 
+      //////////////////////////////////////////////////
+      // validate rules if zoneIdFromFieldName is set //
+      //////////////////////////////////////////////////
       if(StringUtils.hasContent(zoneIdFromFieldName))
       {
+         if(StringUtils.hasContent(defaultZoneId))
+         {
+            errors.add("You may not specify both zoneIdFromFieldName and defaultZoneId in DateTimeDisplayValueBehavior on" + errorSuffix);
+         }
+
          if(!tableMetaData.getFields().containsKey(zoneIdFromFieldName))
          {
             errors.add("Unrecognized field name [" + zoneIdFromFieldName + "] for [zoneIdFromFieldName] in DateTimeDisplayValueBehavior on" + errorSuffix);
@@ -156,6 +188,50 @@ public class DateTimeDisplayValueBehavior implements FieldDisplayBehavior<DateTi
          }
       }
 
+      ////////////////////////////////////////////
+      // validate rules if defaultZoneId is set //
+      ////////////////////////////////////////////
+      if(StringUtils.hasContent(defaultZoneId))
+      {
+         /////////////////////////////////////////////////////////////////////////////////////////////
+         // would check that you didn't specify from zoneIdFromFieldName - but that's covered above //
+         /////////////////////////////////////////////////////////////////////////////////////////////
+
+         if(StringUtils.hasContent(fallbackZoneId))
+         {
+            errors.add("You may not specify both defaultZoneId and fallbackZoneId in DateTimeDisplayValueBehavior on" + errorSuffix);
+         }
+
+         try
+         {
+            ZoneId.of(defaultZoneId);
+         }
+         catch(Exception e)
+         {
+            errors.add("Invalid ZoneId [" + defaultZoneId + "] for [defaultZoneId] in DateTimeDisplayValueBehavior on" + errorSuffix + "; " + e.getMessage());
+         }
+      }
+
+      /////////////////////////////////////////////
+      // validate rules if fallbackZoneId is set //
+      /////////////////////////////////////////////
+      if(StringUtils.hasContent(fallbackZoneId))
+      {
+         if(!StringUtils.hasContent(zoneIdFromFieldName))
+         {
+            errors.add("You may only set fallbackZoneId if using zoneIdFromFieldName in DateTimeDisplayValueBehavior on" + errorSuffix);
+         }
+
+         try
+         {
+            ZoneId.of(fallbackZoneId);
+         }
+         catch(Exception e)
+         {
+            errors.add("Invalid ZoneId [" + fallbackZoneId + "] for [fallbackZoneId] in DateTimeDisplayValueBehavior on" + errorSuffix + "; " + e.getMessage());
+         }
+      }
+
       return (errors);
    }
 
@@ -191,6 +267,7 @@ public class DateTimeDisplayValueBehavior implements FieldDisplayBehavior<DateTi
    }
 
 
+
    /*******************************************************************************
     ** Getter for defaultZoneId
     *******************************************************************************/
@@ -221,4 +298,34 @@ public class DateTimeDisplayValueBehavior implements FieldDisplayBehavior<DateTi
    }
 
 
+
+   /*******************************************************************************
+    ** Getter for fallbackZoneId
+    *******************************************************************************/
+   public String getFallbackZoneId()
+   {
+      return (this.fallbackZoneId);
+   }
+
+
+
+   /*******************************************************************************
+    ** Setter for fallbackZoneId
+    *******************************************************************************/
+   public void setFallbackZoneId(String fallbackZoneId)
+   {
+      this.fallbackZoneId = fallbackZoneId;
+   }
+
+
+
+   /*******************************************************************************
+    ** Fluent setter for fallbackZoneId
+    *******************************************************************************/
+   public DateTimeDisplayValueBehavior withFallbackZoneId(String fallbackZoneId)
+   {
+      this.fallbackZoneId = fallbackZoneId;
+      return (this);
+   }
+
 }
diff --git a/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehaviorTest.java b/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehaviorTest.java
index a03f4416..ca31fdc3 100644
--- a/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehaviorTest.java
+++ b/qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/model/metadata/fields/DateTimeDisplayValueBehaviorTest.java
@@ -24,6 +24,8 @@ package com.kingsrook.qqq.backend.core.model.metadata.fields;
 
 import java.time.Instant;
 import java.util.List;
+import java.util.function.Consumer;
+import java.util.function.Function;
 import com.kingsrook.qqq.backend.core.BaseTest;
 import com.kingsrook.qqq.backend.core.actions.values.ValueBehaviorApplier;
 import com.kingsrook.qqq.backend.core.context.QContext;
@@ -32,6 +34,7 @@ import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableMetaData;
 import com.kingsrook.qqq.backend.core.utils.TestUtils;
 import org.junit.jupiter.api.Test;
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 
@@ -45,7 +48,7 @@ class DateTimeDisplayValueBehaviorTest extends BaseTest
     **
     *******************************************************************************/
    @Test
-   void test()
+   void testZoneIdFromFieldName()
    {
       QInstance      qInstance = QContext.getQInstance();
       QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_PERSON_MEMORY);
@@ -58,4 +61,109 @@ class DateTimeDisplayValueBehaviorTest extends BaseTest
       assertEquals("2024-04-04 02:12:00 PM CDT", record.getDisplayValue("createDate"));
    }
 
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testZoneIdFromFieldNameWithFallback()
+   {
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_PERSON_MEMORY);
+
+      table.withField(new QFieldMetaData("timeZone", QFieldType.STRING));
+      table.getField("createDate").withBehavior(new DateTimeDisplayValueBehavior().withZoneIdFromFieldName("timeZone").withFallbackZoneId("America/Denver"));
+
+      QRecord record = new QRecord().withValue("createDate", Instant.parse("2024-04-04T19:12:00Z")).withValue("timeZone", "whodis");
+      ValueBehaviorApplier.applyFieldBehaviors(ValueBehaviorApplier.Action.FORMATTING, qInstance, table, List.of(record), null);
+      assertEquals("2024-04-04 01:12:00 PM MDT", record.getDisplayValue("createDate"));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testDefaultZoneId()
+   {
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table     = qInstance.getTable(TestUtils.TABLE_NAME_PERSON_MEMORY);
+
+      table.withField(new QFieldMetaData("timeZone", QFieldType.STRING));
+      table.getField("createDate").withBehavior(new DateTimeDisplayValueBehavior().withDefaultZoneId("America/Los_Angeles"));
+
+      QRecord record = new QRecord().withValue("createDate", Instant.parse("2024-04-04T19:12:00Z"));
+      ValueBehaviorApplier.applyFieldBehaviors(ValueBehaviorApplier.Action.FORMATTING, qInstance, table, List.of(record), null);
+      assertEquals("2024-04-04 12:12:00 PM PDT", record.getDisplayValue("createDate"));
+   }
+
+
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testValidation()
+   {
+      QInstance      qInstance = QContext.getQInstance();
+      QTableMetaData table = qInstance.getTable(TestUtils.TABLE_NAME_PERSON_MEMORY);
+      QFieldMetaData field = table.getField("createDate");
+      table.withField(new QFieldMetaData("timeZone", QFieldType.STRING));
+
+      Function<Consumer<DateTimeDisplayValueBehavior>, List<String>> testOne = setup ->
+      {
+         DateTimeDisplayValueBehavior dateTimeDisplayValueBehavior = new DateTimeDisplayValueBehavior();
+         setup.accept(dateTimeDisplayValueBehavior);
+         return (dateTimeDisplayValueBehavior.validateBehaviorConfiguration(table, field));
+      };
+
+      ///////////////////
+      // valid configs //
+      ///////////////////
+      assertThat(testOne.apply(b -> b.toString())).isEmpty(); // default setup (noop use-case) is valid
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("timeZone"))).isEmpty();
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("timeZone").withFallbackZoneId("UTC"))).isEmpty();
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("timeZone").withFallbackZoneId("America/Chicago"))).isEmpty();
+      assertThat(testOne.apply(b -> b.withDefaultZoneId("UTC"))).isEmpty();
+      assertThat(testOne.apply(b -> b.withDefaultZoneId("America/Chicago"))).isEmpty();
+
+      /////////////////////
+      // invalid configs //
+      /////////////////////
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("notAField")))
+         .hasSize(1).first().asString()
+         .contains("Unrecognized field name");
+
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("id")))
+         .hasSize(1).first().asString()
+         .contains("A non-STRING type [INTEGER] was specified as the zoneIdFromFieldName field");
+
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("timeZone").withDefaultZoneId("UTC")))
+         .hasSize(1).first().asString()
+         .contains("You may not specify both zoneIdFromFieldName and defaultZoneId");
+
+      assertThat(testOne.apply(b -> b.withDefaultZoneId("UTC").withFallbackZoneId("UTC")))
+         .hasSize(2)
+         .anyMatch(s -> s.contains("You may not specify both defaultZoneId and fallbackZoneId"))
+         .anyMatch(s -> s.contains("You may only set fallbackZoneId if using zoneIdFromFieldName"));
+
+      assertThat(testOne.apply(b -> b.withFallbackZoneId("UTC")))
+         .hasSize(1).first().asString()
+         .contains("You may only set fallbackZoneId if using zoneIdFromFieldName");
+
+      assertThat(testOne.apply(b -> b.withDefaultZoneId("notAZone")))
+         .hasSize(1).first().asString()
+         .contains("Invalid ZoneId [notAZone] for [defaultZoneId]");
+
+      assertThat(testOne.apply(b -> b.withZoneIdFromFieldName("timeZone").withFallbackZoneId("notAZone")))
+         .hasSize(1).first().asString()
+         .contains("Invalid ZoneId [notAZone] for [fallbackZoneId]");
+
+      assertThat(new DateTimeDisplayValueBehavior().validateBehaviorConfiguration(table, table.getField("firstName")))
+         .hasSize(1).first().asString()
+         .contains("non-DATE_TIME field [firstName]");
+   }
+
 }
\ No newline at end of file