# import necessary libraries
import pandas as pd
from datetime import datetime

# create a sample series
dates = pd.Series(['2022-02-01', '2022-02-02', '2022-02-03'])

# define lambda function 
convert_to_date = lambda x: datetime.strptime(x, '%Y-%m-%d')

# apply lambda function using apply()
timeseries = dates.apply(convert_to_date)

# print the result
print(timeseries)