假设我输入df.dtypes时返回

Name               int64
UpdateTime         datetime64[ns]
EnquiryDate        datetime64[ns]
dtype: object

ls_UpdateDate = df['UpdateTime'].sort_values().unique().tolist()

print(ls_UpdateDate)

给我

[1570492800000000000,1570665600000000000,1571097600000000000,1571270400000000000,1571356800000000000,1571616000000000000,1571788800000000000,1571875200000000000,1572480000000000000]

我该怎么做才能以普通日期格式获取列表，而没有h，m，s

谢谢！