疑问：时间的表示法-ValueError: time data '2020-02-24T18:00:00' does not match format '%Y-%m-%d %H:%M:%S'

import pandas as pd
import numpy as np
from datetime import datetime,timedelta
from sklearn.metrics import mean_squared_error
from scipy.optimize import curve_fit
from scipy.optimize import fsolve
import matplotlib.pyplot as plt
%matplotlib inline
import time

url = 'https://raw.githubusercontent.com/pcm-dpc/COVID-19/master/dati-andamento-nazionale/dpc-covid19-ita-andamento-nazionale.csv'
df =pd.read_csv(url)
df
df =df.loc[:,['data','totale_casi']]
FMT ='%Y-%m-%d %H:%M:%S'
date =df['data']
df['data']= date.map(lambda x : (datetime.strptime(x, FMT) -datetime.strptime("2020-01-01 00:00:00", FMT)).days  )