save excel file with current date and sheets in Python

import pandas as pd
from datetime import datetime

currentDay = datetime.now().day
currentMonth = datetime.now().month
currentYear = datetime.now().year
e ='%s.%s.%s'%(currentDay,currentMonth,currentYear)
file_name = 'auto.bg'
writer = pd.ExcelWriter(f'{file_name}{e}.xlsx', engine='openpyxl')
df_diesel.to_excel(writer, sheet_name='Diesel engines')
df_gasoline.to_excel(writer, sheet_name='Gasoline engines')
df_electric.to_excel(writer, sheet_name='Electric engines')
df_hybrid.to_excel(writer, sheet_name='Hybrid engines')
writer.save()