Isoweekday() Method Of Datetime Class In Python Last Updated : 14 Aug, 2021 Comments Improve Suggest changes Like Article Like Report Isoweekday() is a method of the DateTime class that tells the day of the given date. It returns an integer that corresponds to a particular day. Syntax: datetime.isoweekday() Parameters: None Return Value: It returns an integer which corresponds to a day as per the table Integer ReturnedDay of the week1Monday2Tuesday3Wednesday4Thursday5Friday6Saturday7Sunday Example 1: Print the day of the current date. Python3 # importing the datetime module import datetime # Creating an dictionary with the return # value as keys and the day as the value # This is used to retrieve the day of the # week using the return value of the # isoweekday() function weekdays = {1: "Monday", 2: "Tuesday", 3: "Wednesday", 4: "Thursday", 5: "Friday", 6: "Saturday", 7: "Sunday"} # Getting current date using today() # function of the datetime class todays_date = datetime.date.today() print("Today's date is :", todays_date) # Using the isoweekday() function to # retrieve the day of the given date day = todays_date.isoweekday() print("The date", todays_date, "falls on", weekdays[day]) Output: Today's date is : 2021-07-27 The date 2021-07-27 falls on Tuesday Example 2: Get the day of the week for today's date from 2010 to the current year Python3 # importing the datetime module import datetime # Creating an dictionary with the return # value as keys and the day as the value # This is used to retrieve the day of the # week using the return value of the # isoweekday() function weekdays = {1: "Monday", 2: "Tuesday", 3: "Wednesday", 4: "Thursday", 5: "Friday", 6: "Saturday", 7: "Sunday"} # Getting current year using today() function # of the datetime class and the year attribute Today = datetime.date.today() current_year = Today.year for i in range(2010, current_year+1): # Printing the day of the year # by first creating an datetime object # for the starting day of the year and # then we use isoweekday # to get the value and we use the # weekdays to retrieve the day of the year print("The {}/{} in the year {} has fallen on {}".\ format(Today.month, Today.day, i, weekdays[datetime.date(i, Today.month, Today.day).isoweekday()])) Output: The 7/28 in the year 2010 has fallen on Wednesday The 7/28 in the year 2011 has fallen on Thursday The 7/28 in the year 2012 has fallen on Saturday The 7/28 in the year 2013 has fallen on Sunday The 7/28 in the year 2014 has fallen on Monday The 7/28 in the year 2015 has fallen on Tuesday The 7/28 in the year 2016 has fallen on Thursday The 7/28 in the year 2017 has fallen on Friday The 7/28 in the year 2018 has fallen on Saturday The 7/28 in the year 2019 has fallen on Sunday The 7/28 in the year 2020 has fallen on Tuesday The 7/28 in the year 2021 has fallen on Wednesday Comment More infoAdvertise with us Next Article Datetime.replace() Function in Python M magichat Follow Improve Article Tags : Python Python-datetime Practice Tags : python Similar Reads Python datetime module In Python, date and time are not data types of their own, but a module named DateTime in Python can be imported to work with the date as well as time. 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