diff --git a/src/modules/ad/tests/unit/infrastructure/output-datetime-transformer.spec.ts b/src/modules/ad/tests/unit/infrastructure/output-datetime-transformer.spec.ts
new file mode 100644
index 0000000..4c3dcf8
--- /dev/null
+++ b/src/modules/ad/tests/unit/infrastructure/output-datetime-transformer.spec.ts
@@ -0,0 +1,271 @@
+import {
+  PARAMS_PROVIDER,
+  TIMEZONE_FINDER,
+  TIME_CONVERTER,
+} from '@modules/ad/ad.di-tokens';
+import { Frequency } from '@modules/ad/core/application/ports/datetime-transformer.port';
+import { DefaultParamsProviderPort } from '@modules/ad/core/application/ports/default-params-provider.port';
+import { TimeConverterPort } from '@modules/ad/core/application/ports/time-converter.port';
+import { TimezoneFinderPort } from '@modules/ad/core/application/ports/timezone-finder.port';
+import { OutputDateTimeTransformer } from '@modules/ad/infrastructure/output-datetime-transformer';
+import { Test, TestingModule } from '@nestjs/testing';
+
+const mockDefaultParamsProvider: DefaultParamsProviderPort = {
+  getParams: () => {
+    return {
+      DEPARTURE_TIME_MARGIN: 900,
+      DRIVER: false,
+      SEATS_PROPOSED: 3,
+      PASSENGER: true,
+      SEATS_REQUESTED: 1,
+      STRICT: false,
+      DEFAULT_TIMEZONE: 'Europe/Paris',
+    };
+  },
+};
+
+const mockTimezoneFinder: TimezoneFinderPort = {
+  timezones: jest.fn().mockImplementation(() => ['Europe/Paris']),
+};
+
+const mockTimeConverter: TimeConverterPort = {
+  localStringTimeToUtcStringTime: jest.fn(),
+  utcStringTimeToLocalStringTime: jest
+    .fn()
+    .mockImplementationOnce(() => '00:15'),
+  localStringDateTimeToUtcDate: jest.fn(),
+  utcStringDateTimeToLocalIsoString: jest
+    .fn()
+    .mockImplementationOnce(() => '2023-07-30T08:15:00.000+02:00')
+    .mockImplementationOnce(() => '2023-07-20T10:15:00.000+02:00')
+    .mockImplementationOnce(() => '2023-07-19T23:15:00.000+02:00')
+    .mockImplementationOnce(() => '2023-07-20T00:15:00.000+02:00'),
+  utcUnixEpochDayFromTime: jest.fn(),
+  localUnixEpochDayFromTime: jest
+    .fn()
+    .mockImplementationOnce(() => 4)
+    .mockImplementationOnce(() => 5)
+    .mockImplementationOnce(() => 5)
+    .mockImplementationOnce(() => 3)
+    .mockImplementationOnce(() => 3),
+};
+
+describe('Output Datetime Transformer', () => {
+  let outputDatetimeTransformer: OutputDateTimeTransformer;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        {
+          provide: PARAMS_PROVIDER,
+          useValue: mockDefaultParamsProvider,
+        },
+        {
+          provide: TIMEZONE_FINDER,
+          useValue: mockTimezoneFinder,
+        },
+        {
+          provide: TIME_CONVERTER,
+          useValue: mockTimeConverter,
+        },
+        OutputDateTimeTransformer,
+      ],
+    }).compile();
+
+    outputDatetimeTransformer = module.get<OutputDateTimeTransformer>(
+      OutputDateTimeTransformer,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(outputDatetimeTransformer).toBeDefined();
+  });
+
+  describe('fromDate', () => {
+    it('should return fromDate as is if frequency is recurrent', () => {
+      const transformedFromDate: string = outputDatetimeTransformer.fromDate(
+        {
+          date: '2023-07-30',
+          time: '07:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(transformedFromDate).toBe('2023-07-30');
+    });
+    it('should return transformed fromDate if frequency is punctual and coordinates are those of Nancy', () => {
+      const transformedFromDate: string = outputDatetimeTransformer.fromDate(
+        {
+          date: '2023-07-30',
+          time: '07:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.PUNCTUAL,
+      );
+      expect(transformedFromDate).toBe('2023-07-30');
+    });
+  });
+
+  describe('toDate', () => {
+    it('should return toDate as is if frequency is recurrent', () => {
+      const transformedToDate: string = outputDatetimeTransformer.toDate(
+        '2024-07-29',
+        {
+          date: '2023-07-20',
+          time: '10:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(transformedToDate).toBe('2024-07-29');
+    });
+    it('should return transformed fromDate if frequency is punctual', () => {
+      const transformedToDate: string = outputDatetimeTransformer.toDate(
+        '2024-07-30',
+        {
+          date: '2023-07-20',
+          time: '08:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.PUNCTUAL,
+      );
+      expect(transformedToDate).toBe('2023-07-20');
+    });
+  });
+
+  describe('day', () => {
+    it('should not change day if frequency is recurrent and converted local time is on the same day', () => {
+      const day: number = outputDatetimeTransformer.day(
+        1,
+        {
+          date: '2023-07-24',
+          time: '00:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(day).toBe(1);
+    });
+    it('should change day if frequency is recurrent and converted local time is on the next day', () => {
+      const day: number = outputDatetimeTransformer.day(
+        0,
+        {
+          date: '2023-07-23',
+          time: '23:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(day).toBe(1);
+    });
+    it('should change day if frequency is recurrent and converted local time is on the next day and given day is saturday', () => {
+      const day: number = outputDatetimeTransformer.day(
+        6,
+        {
+          date: '2023-07-23',
+          time: '23:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(day).toBe(0);
+    });
+    it('should change day if frequency is recurrent and converted local time is on the previous day', () => {
+      const day: number = outputDatetimeTransformer.day(
+        1,
+        {
+          date: '2023-07-25',
+          time: '00:15',
+          coordinates: {
+            lon: 30.82,
+            lat: 49.37,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(day).toBe(0);
+    });
+    it('should change day if frequency is recurrent and converted local time is on the previous day and given day is sunday(0)', () => {
+      const day: number = outputDatetimeTransformer.day(
+        0,
+        {
+          date: '2023-07-30',
+          time: '00:15',
+          coordinates: {
+            lon: 30.82,
+            lat: 49.37,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(day).toBe(6);
+    });
+    it('should return local fromDate day if frequency is punctual', () => {
+      const day: number = outputDatetimeTransformer.day(
+        1,
+        {
+          date: '2023-07-20',
+          time: '00:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.PUNCTUAL,
+      );
+      expect(day).toBe(3);
+    });
+  });
+
+  describe('time', () => {
+    it('should transform utc time to local time if frequency is recurrent', () => {
+      const time: string = outputDatetimeTransformer.time(
+        {
+          date: '2023-07-23',
+          time: '23:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.RECURRENT,
+      );
+      expect(time).toBe('00:15');
+    });
+    it('should return local time if frequency is punctual', () => {
+      const time: string = outputDatetimeTransformer.time(
+        {
+          date: '2023-07-19',
+          time: '23:15',
+          coordinates: {
+            lon: 6.175,
+            lat: 48.685,
+          },
+        },
+        Frequency.PUNCTUAL,
+      );
+      expect(time).toBe('00:15');
+    });
+  });
+});