Номер дня питона с даты
import datetime
date = '2021-05-21 11:22:03'
datem = datetime.datetime.strptime(date, "%Y-%m-%d %H:%M:%S")
print(datem.day) # 25
print(datem.month) # 5
print(datem.year) # 2021
print(datem.hour) # 11
print(datem.minute) # 22
print(datem.second) # 3
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