The date field is getting changed while reading data from source .xls file to the dataframe. In the source xl file all columns are strings but i am not sure why date column alone behaves differently

In Source file date is 1/24/2022.

In dataframe it is 1/24/22

Code used:

from pyspark.sql.functions import *

import pyspark.sql.functions as sf

import pyspark.sql.types

import pandas as pd

import os

import glob

filenames = glob.glob(PathSource + "/*.xls")

dfs = []

for df in dfs: 

  xl_file = pd.ExcelFile(filenames)

  df=xl_file.parse('Sheet1')

  dfs.concat(df, ignore_index=True)

display(df)

Thanks in Advance for any help or guidance.