pandas columns部分为时间格式如何转换格式

如图，粗体为index和columns，columns不全为datetime格式，如何仅将datetime转换为%Y-%m-%d.

from datetime import datetime
import pandas as pd

df1 = pd.DataFrame(
    {
        "name": ["Liver", "Arry", "Ack","Eorge","Oah"],
        "team": ["E", "C", "A","C","D"],
        "2022-01-07 00:00:00": ["89", "36", "57","93","65"],
        "2022-01-08 00:00:00": ["21", "33", "60","95","49"],
    }
)

def renameCol(rawList):
    newList = []
    for i in rawList:
        try:
            if isinstance(datetime.strptime(i,'%Y-%m-%d %H:%M:%S'), datetime) == True:
                newI = datetime.strptime(i,'%Y-%m-%d %H:%M:%S').strftime("%Y-%m-%d")
                newList.append(newI)
        except:
            newList.append(i)
    return newList

df1.columns = renameCol(list(df1.columns))

df1