calendarGraph1

import pandas as pd
import datetime as dt

booksv2 = pd.read_csv('book1.csv')

booksv2['Start'] = booksv2['Start'].apply(lambda x: dt.datetime.strptime(str(x),'%d/%m/%Y'))
booksv2['End'] = booksv2['End'].apply(lambda x: dt.datetime.strptime(str(x),'%d/%m/%Y'))
min_date = min(list(booksv2['Start'])+list(booksv2['End']))
max_date = max(list(booksv2['Start'])+list(booksv2['End']))
#year = min_date.year
year = 2018