Problem with getting testnet data from binance

Question

I am trying to get trade data from the Binance API using the testnet server. The code I have written runs, however, I am trying to collect data for daily intervals and am using a period of 5 days from 1 May 2022 - 5 May 2022. This should give me five sets of data but I only get data for two days. Why does this happen? I have attached my code:

from binance.client import Client
import pandas as pd 
import os
import time
from datetime import datetime
import plotly.graph_objects as go
import pprint

api_test_key = os.getenv("API_TEST_KEY")
api_test_secret =  os.getenv("API_TEST_SECRET")

client = Client(api_test_key, api_test_secret, testnet=True)
start = "1 May 2022"
end = "5 May 2022"

klines = client.get_historical_klines(symbol='ETHUSDT', interval=client.KLINE_INTERVAL_1DAY, 
                                      start_str=start, end_str=end)

pprint.pprint(klines)