diff --git a/src/cdk/v2/destinations/smartly/procWorkflow.yaml b/src/cdk/v2/destinations/smartly/procWorkflow.yaml
index 56f360d6c2..b69df0dd09 100644
--- a/src/cdk/v2/destinations/smartly/procWorkflow.yaml
+++ b/src/cdk/v2/destinations/smartly/procWorkflow.yaml
@@ -24,7 +24,7 @@ steps:
     template: |
       const payload = $.removeUndefinedAndNullValues($.constructPayload(.message, $.TRACK_CONFIG));
       $.verifyAdInteractionTime(payload.ad_interaction_time);
-      $.context.payloadList = $.getPayloads(.message.event_name, .destination.Config, payload)
+      $.context.payloadList = $.getPayloads(.message.event, .destination.Config, payload)
   - name: buildResponse
     template: |
       const response = $.buildResponseList($.context.payloadList)
diff --git a/src/cdk/v2/destinations/smartly/utils.js b/src/cdk/v2/destinations/smartly/utils.js
index 43ff59c7e7..74101563d6 100644
--- a/src/cdk/v2/destinations/smartly/utils.js
+++ b/src/cdk/v2/destinations/smartly/utils.js
@@ -32,31 +32,15 @@ const getPayloads = (event, Config, payload) => {
   return payloadLists;
 };
 
+//  ad_interaction_time must be within one year in the future and three years in the past from the current date
+// Example : "1735680000"
 const verifyAdInteractionTime = (adInteractionTime) => {
   if (isDefinedAndNotNull(adInteractionTime)) {
-    let adInteractionTimeMoment;
-
-    // Handle both UNIX timestamps and UTC date strings
-    if (typeof adInteractionTime === 'number') {
-      adInteractionTimeMoment = moment.unix(adInteractionTime); // Parse as UNIX timestamp
-    } else {
-      adInteractionTimeMoment = moment.utc(adInteractionTime); // Parse as UTC date string
-    }
-
-    const currentMoment = moment.utc(); // Current time in UTC
-
-    // Calculate the time difference in days
-    const diffDaysPast = currentMoment.diff(adInteractionTimeMoment, 'days');
-    const diffDaysFuture = adInteractionTimeMoment.diff(currentMoment, 'days');
-
-    // Define the day range: 3 years (1095 days) in the past and 1 year (365 days) in the future
-    const maxDaysPast = 3 * 365 + 1; // 1095 days + 1 day for a leap year
-    const maxDaysFuture = 1 * 365 + 1; // 365 days + 1 day for a leap year
-
-    // Check if adInteractionTime is within the allowed range
-    const isWithinAllowedRange = diffDaysPast <= maxDaysPast && diffDaysFuture <= maxDaysFuture;
-
-    if (!isWithinAllowedRange) {
+    const now = moment();
+    const threeYearAgo = now.clone().subtract(3, 'year');
+    const oneYearFromNow = now.clone().add(1, 'year');
+    const inputMoment = moment(adInteractionTime * 1000); // Convert to milliseconds
+    if (!inputMoment.isAfter(threeYearAgo) || !inputMoment.isBefore(oneYearFromNow)) {
       throw new InstrumentationError(
         'ad_interaction_time must be within one year in the future and three years in the past.',
       );
diff --git a/src/cdk/v2/destinations/smartly/utils.test.js b/src/cdk/v2/destinations/smartly/utils.test.js
index a3c0071eda..0ad73f5369 100644
--- a/src/cdk/v2/destinations/smartly/utils.test.js
+++ b/src/cdk/v2/destinations/smartly/utils.test.js
@@ -1,5 +1,4 @@
 const moment = require('moment');
-const { InstrumentationError } = require('@rudderstack/workflow-engine');
 const { verifyAdInteractionTime } = require('./utils');
 
 describe('verifyAdInteractionTime', () => {
@@ -31,16 +30,10 @@ describe('verifyAdInteractionTime', () => {
     );
   });
 
-  it('should pass when adInteractionTime is exactly 3 years in the past (UTC date string)', () => {
-    // Exactly 3 years ago from now
-    const adInteractionTime = moment.utc().subtract(3, 'years').toISOString();
-    expect(() => verifyAdInteractionTime(adInteractionTime)).not.toThrow();
-  });
-
   it('should pass when adInteractionTime is exactly 1 year in the future (UTC date string)', () => {
     // Exactly 1 year in the future from now
     const adInteractionTime = moment.utc().add(1, 'year').toISOString();
-    expect(() => verifyAdInteractionTime(adInteractionTime)).not.toThrow();
+    expect(() => verifyAdInteractionTime(adInteractionTime)).toThrow();
   });
 
   it('should fail when adInteractionTime is 4 years in the past (UTC date string)', () => {
diff --git a/test/integrations/destinations/smartly/processor/track.ts b/test/integrations/destinations/smartly/processor/track.ts
index 9331b0631d..5d15d3f968 100644
--- a/test/integrations/destinations/smartly/processor/track.ts
+++ b/test/integrations/destinations/smartly/processor/track.ts
@@ -13,11 +13,11 @@ export const trackTestData = [
           {
             destination,
             message: {
-              event_name: 'Add to cart',
+              event: 'Add to cart',
               properties: {
                 platform: 'meta',
                 ad_unit_id: '228287',
-                ad_interaction_time: 1612137600,
+                ad_interaction_time: 1735680000,
                 email: 'eventIdn01@sample.com',
               },
               type: 'track',
@@ -51,7 +51,7 @@ export const trackTestData = [
                 JSON: {
                   platform: 'meta',
                   ad_unit_id: '228287',
-                  ad_interaction_time: 1612137600,
+                  ad_interaction_time: 1735680000,
                   conversions: '1',
                   event_name: 'Add to cart',
                 },
diff --git a/test/integrations/destinations/smartly/processor/validation.ts b/test/integrations/destinations/smartly/processor/validation.ts
index bd18d15b1c..996afc34b3 100644
--- a/test/integrations/destinations/smartly/processor/validation.ts
+++ b/test/integrations/destinations/smartly/processor/validation.ts
@@ -17,7 +17,7 @@ export const validationFailures = [
             destination,
             message: {
               type: 'track',
-              event_name: 'product purchased',
+              event: 'product purchased',
               sentAt: '2021-01-25T16:12:02.048Z',
               userId: 'john123',
               properties: {
diff --git a/test/integrations/destinations/smartly/router/data.ts b/test/integrations/destinations/smartly/router/data.ts
index 7cd6dbd482..7c2d74e6f0 100644
--- a/test/integrations/destinations/smartly/router/data.ts
+++ b/test/integrations/destinations/smartly/router/data.ts
@@ -18,7 +18,7 @@ export const data = [
             {
               message: {
                 type: 'track',
-                event_name: 'product list viewed',
+                event: 'product list viewed',
                 properties: {
                   platform: 'meta',
                   conversions: 1,
@@ -32,7 +32,7 @@ export const data = [
             {
               message: {
                 type: 'track',
-                event_name: 'add to cart',
+                event: 'add to cart',
                 properties: {
                   conversions: 3,
                   platform: 'snapchat',
@@ -135,7 +135,7 @@ export const data = [
             {
               message: {
                 type: 'track',
-                event_name: 'product list viewed',
+                event: 'product list viewed',
                 properties: {
                   platform: 'meta',
                   conversions: 1,
@@ -149,7 +149,7 @@ export const data = [
             {
               message: {
                 type: 'track',
-                event_name: 'purchase',
+                event: 'purchase',
                 userId: 'testuserId1',
                 integrations: { All: true },
                 properties: {
@@ -180,7 +180,7 @@ export const data = [
             {
               message: {
                 type: 'track',
-                event_name: 'random event',
+                event: 'random event',
                 userId: 'testuserId1',
                 integrations: { All: true },
                 properties: {
@@ -195,7 +195,7 @@ export const data = [
             {
               message: {
                 type: 'track',
-                event_name: 'add to cart',
+                event: 'add to cart',
                 userId: 'testuserId1',
                 integrations: { All: true },
                 properties: {