diff --git a/src/orm/base_model/index.ts b/src/orm/base_model/index.ts
index 1efbce2d..12299a74 100644
--- a/src/orm/base_model/index.ts
+++ b/src/orm/base_model/index.ts
@@ -8,7 +8,6 @@
  */
 
 import { DateTime } from 'luxon'
-import equal from 'fast-deep-equal'
 import Hooks from '@poppinss/hooks'
 import lodash from '@poppinss/utils/lodash'
 import { Exception, defineStaticProperty } from '@poppinss/utils'
@@ -63,6 +62,8 @@ import {
   ensureRelation,
   managedTransaction,
   normalizeCherryPickObject,
+  transformDateValue,
+  compareValues,
 } from '../../utils/index.js'
 
 const MANY_RELATIONS = ['hasMany', 'manyToMany', 'hasManyThrough']
@@ -207,9 +208,13 @@ class BaseModelImpl implements LucidRow {
      * array
      */
     return rowObjects.map((rowObject: any) => {
-      const existingRow = existingRows.find((one: any) => {
-        /* eslint-disable-next-line eqeqeq */
-        return keys.every((key) => one[key] == rowObject[key])
+      const existingRow = existingRows.find((row: any) => {
+        return keys.every((key) => {
+          const objectValue = rowObject[key]
+          const rowValue = row[key]
+
+          return compareValues(rowValue, objectValue)
+        })
       })
 
       /**
@@ -852,6 +857,8 @@ class BaseModelImpl implements LucidRow {
     payload: any,
     options?: ModelAssignOptions
   ): Promise<any[]> {
+    const client = this.$adapter.modelConstructorClient(this as LucidModel, options)
+
     uniqueKeys = Array.isArray(uniqueKeys) ? uniqueKeys : [uniqueKeys]
     const uniquenessPair: { key: string; value: string[] }[] = uniqueKeys.map(
       (uniqueKey: string) => {
@@ -861,7 +868,7 @@ class BaseModelImpl implements LucidRow {
             throw new Exception(
               `Value for the "${uniqueKey}" is null or undefined inside "fetchOrNewUpMany" payload`
             )
-          }),
+          }).map((value) => transformDateValue(value, client.dialect)),
         }
       }
     )
@@ -896,6 +903,8 @@ class BaseModelImpl implements LucidRow {
     payload: any,
     options?: ModelAssignOptions
   ): Promise<any[]> {
+    const client = this.$adapter.modelConstructorClient(this as LucidModel, options)
+
     uniqueKeys = Array.isArray(uniqueKeys) ? uniqueKeys : [uniqueKeys]
     const uniquenessPair: { key: string; value: string[] }[] = uniqueKeys.map(
       (uniqueKey: string) => {
@@ -905,7 +914,7 @@ class BaseModelImpl implements LucidRow {
             throw new Exception(
               `Value for the "${uniqueKey}" is null or undefined inside "fetchOrCreateMany" payload`
             )
-          }),
+          }).map((value) => transformDateValue(value, client.dialect)),
         }
       }
     )
@@ -960,6 +969,8 @@ class BaseModelImpl implements LucidRow {
     payload: any,
     options?: ModelAssignOptions
   ): Promise<any> {
+    const client = this.$adapter.modelConstructorClient(this as LucidModel, options)
+
     uniqueKeys = Array.isArray(uniqueKeys) ? uniqueKeys : [uniqueKeys]
     const uniquenessPair: { key: string; value: string[] }[] = uniqueKeys.map(
       (uniqueKey: string) => {
@@ -969,13 +980,11 @@ class BaseModelImpl implements LucidRow {
             throw new Exception(
               `Value for the "${uniqueKey}" is null or undefined inside "updateOrCreateMany" payload`
             )
-          }),
+          }).map((value) => transformDateValue(value, client.dialect)),
         }
       }
     )
 
-    const client = this.$adapter.modelConstructorClient(this as LucidModel, options)
-
     return managedTransaction(client, async (trx) => {
       /**
        * Find existing rows
@@ -1287,15 +1296,10 @@ class BaseModelImpl implements LucidRow {
       const originalValue = this.$original[key]
       let isEqual = true
 
-      if (DateTime.isDateTime(value) || DateTime.isDateTime(originalValue)) {
-        isEqual =
-          DateTime.isDateTime(value) && DateTime.isDateTime(originalValue)
-            ? value.equals(originalValue)
-            : value === originalValue
-      } else if (isObject(value) && 'isDirty' in value) {
+      if (isObject(value) && 'isDirty' in value) {
         isEqual = !value.isDirty
       } else {
-        isEqual = equal(originalValue, value)
+        isEqual = compareValues(originalValue, value)
       }
 
       if (!isEqual) {
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 2af3ab10..d239aa79 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -12,9 +12,16 @@ import { join, extname } from 'node:path'
 import { Exception, fsReadAll, isScriptFile } from '@poppinss/utils'
 import { RelationshipsContract } from '../types/relations.js'
 import { LucidRow, ModelObject, CherryPickFields } from '../types/model.js'
-import { FileNode, QueryClientContract, TransactionClientContract } from '../types/database.js'
+import {
+  DialectContract,
+  FileNode,
+  QueryClientContract,
+  TransactionClientContract,
+} from '../types/database.js'
 import { fileURLToPath, pathToFileURL } from 'node:url'
 import * as errors from '../errors.js'
+import { DateTime } from 'luxon'
+import equal from 'fast-deep-equal'
 
 /**
  * Ensure that relation is defined
@@ -53,6 +60,30 @@ export function collectValues(payload: any[], key: string, missingCallback: () =
   })
 }
 
+/**
+ * Transform value if it is an instance of DateTime, so it can be processed by query builder
+ */
+export function transformDateValue(value: unknown, dialect: DialectContract) {
+  if (DateTime.isDateTime(value)) {
+    return value.toFormat(dialect.dateTimeFormat)
+  }
+
+  return value
+}
+
+/**
+ * Compare two values deeply whether they are equal or not
+ */
+export function compareValues(valueA: unknown, valueB: unknown) {
+  if (DateTime.isDateTime(valueA) || DateTime.isDateTime(valueB)) {
+    return DateTime.isDateTime(valueA) && DateTime.isDateTime(valueB)
+      ? valueA.equals(valueB)
+      : valueA === valueB
+  } else {
+    return equal(valueA, valueB)
+  }
+}
+
 /**
  * Raises exception when a relationship `booted` property is false.
  */
diff --git a/test/orm/base_model.spec.ts b/test/orm/base_model.spec.ts
index 205c4b1b..3ceaf54c 100644
--- a/test/orm/base_model.spec.ts
+++ b/test/orm/base_model.spec.ts
@@ -4888,6 +4888,68 @@ test.group('Base Model | fetch', (group) => {
     assert.lengthOf(usersList, 1)
     assert.equal(usersList[0].points, 2)
   })
+
+  test('updateOrCreateMany should work with DateTime', async ({ fs, assert }) => {
+    const app = new AppFactory().create(fs.baseUrl, () => {})
+    await app.init()
+    const db = getDb()
+    const adapter = ormAdapter(db)
+
+    const BaseModel = getBaseModel(adapter)
+
+    class User extends BaseModel {
+      @column({ isPrimary: true })
+      declare id: number
+
+      @column()
+      declare username: string
+
+      @column()
+      declare email: string
+
+      @column.dateTime()
+      declare createdAt: DateTime
+    }
+
+    const createdAt1 = DateTime.now().minus({ days: 2 }).startOf('second')
+    const createdAt2 = DateTime.now().minus({ days: 1 }).startOf('second')
+
+    await User.createMany([
+      {
+        username: 'virk1',
+        email: 'virk+1@adonisjs.com',
+        createdAt: createdAt1,
+      },
+      {
+        username: 'virk2',
+        email: 'virk+2@adonisjs.com',
+        createdAt: createdAt2,
+      },
+    ])
+
+    const users = await User.updateOrCreateMany('createdAt', [
+      {
+        username: 'virk3',
+        email: 'virk+3@adonisjs.com',
+        createdAt: createdAt1,
+      },
+      {
+        username: 'nikk',
+        email: 'nikk@adonisjs.com',
+        createdAt: DateTime.now(),
+      },
+    ])
+
+    assert.lengthOf(users, 2)
+    assert.isTrue(users[0].$isPersisted)
+    assert.isFalse(users[0].$isLocal)
+
+    assert.isTrue(users[1].$isPersisted)
+    assert.isTrue(users[1].$isLocal)
+
+    const usersList = await db.query().from('users')
+    assert.lengthOf(usersList, 3)
+  })
 })
 
 test.group('Base Model | hooks', (group) => {