[Python] yfinance rate limit error when using date variables but not hardcoded dates

I am trying to fetch daily data from yfinance API, but I'm facing a problem that when I use the date variables I get this error:

YFRateLimitError('Too Many Requests. Rate limited. Try after a while.')


but when I hardcode the date it works without any problem.

This is how I get the date (Not working):

import pandas as pd
from datetime import datetime, timedelta

today = pd.Timestamp.today().normalize()
today_date = today.strftime('%Y-%m-%d')
yesterday_date = (today - timedelta(days=1)).strftime('%Y-%m-%d')
tomorrow_date = (today + pd.Timedelta(days=1)).strftime('%Y-%m-%d')

print(f"Yesterday: {yesterday_date}") -> # Yesterday: 2025-07-05
print(f"Today: {today_date}") -> # Today: 2025-07-06
print(f"Tomorrow: {tomorrow_date}") -> # Tomorrow: 2025-07-07

print(f"are thay equal? {today_date == "2025-07-06"}") -> # true
print(f"are thay equal? {yesterday_date == "2025-07-05"}") -> #true
print(f"are thay equal? {tomorrow_date == "2025-07-07"}") -> # true


Hardcoded dates (Working):

stock_data = yf.download(
tickers=ticker,
interval="1d",
start= "2025-07-06",
end= "2025-07-07",
progress=False
)


yfinance version: 0.2.64 python version:3.13.5

I tried the Python datetime object and pandas Timestamp to get dates but I got the same error.

I want to use the date variables instead of hardcoding them because I will make it a cron job in the future.

Any suggestions or guidance would be greatly appreciated. Thank you

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