Isoweekday() Function Of Datetime.date Class In Python Last Updated : 31 Aug, 2021 Comments Improve Suggest changes Like Article Like Report isoweekday() is a function that returns an integer that tells the given date falls on. The integer it returns represents a day according to the table given below. Syntax: datetime.isoweekday() Return Value: an integer in range of [1,7] Integer ReturnedDay of the week1Monday2Tuesday3Wednesday4Thursday5Friday6Saturday7Sunday Example 1: This program grabs the date using the DateTime module and tells the day of the date. Python3 # importing the datetime module import datetime # Creating an list which will # be used to retrieve the day of the # week using the return value of the # isoweekday() function DaysList = ["None", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"] # Using the function today() # to get today's date CurrentDate = datetime.date.today() print("Current Date is :", CurrentDate) # Using the isoweekday() function to # retrieve the day of the given date day = CurrentDate.isoweekday() print("The date", CurrentDate, "falls on", DaysList[day]) Output: Current Date is : 2021-08-18 The date 2021-08-18 falls on Wednesday Example 2: In this example, we will take the user's input for a date and will return the day it falls on. 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 DaysList = ["None", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"] # Getting the user's input day = 18 month = 9 year = 2020 # Creating the datetime object for the user's # input by using the date() function of datetime # class Date = datetime.date(year, month, day) # Using the isoweekday() function # to retrieve the day of the given date day = Date.isoweekday() print("The given date", Date, "falls on", DaysList[day]) Output: The given date 2020-09-18 falls on Friday Example 3: In this example, we will take the user's input for the date and the day that it falls on and return if that's true or not 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 DaysList = ["None", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"] # Getting the user's input day = 1 month = 1 year = 2021 day_fallen = "Friday" # Creating the datetime object for the user's # input by using the date() function of datetime # class Date = datetime.date(year, month, day) # Using the isoweekday() function # to retrieve the day of the given date day = Date.isoweekday() # Checking if the day is matching the user's # day if day_fallen.lower() == DaysList[day].lower(): print("Yes, your given date", Date, "falls on your expected day i.e ", DaysList[day]) else: print("No, your given date", Date, "falls on", DaysList[day], "but not on", day_fallen) Output: Yes, your given date 2021-01-01 falls on your expected day i.e Friday Comment More infoAdvertise with us Next Article timetuple() Function Of Datetime.date Class 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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Note: According to ISO standard 8601 and ISO standard 2015, Thursday is the middle day of a week.Therefore, ISO years always start with Monday.ISO year can start as yearly as 29th January or as late a 2 min read Isoformat() Method Of Datetime Class In PythonIn this example, we will learn How to get date values in ISO 8601 format using Python. The Isoformat() function is used to return a string of date, time, and UTC offset to the corresponding time zone in ISO 8601 format. The standard ISO 8601 format is all about date formats for the Gregorian calenda 4 min read Isoweekday() Method Of Datetime Class In PythonIsoweekday() 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 w 3 min read Datetime.replace() Function in PythonThe datetime.replace() method in Python allows you to modify specific parts of a datetime or date object without changing the original object. Instead, it returns a new modified object with the updated values.For example, suppose we booked a flight for March 15, 2025, at 10:00 AM, but it got resched 3 min read Python DateTime - strptime() Functionstrptime() is another method available in DateTime which is used to format the time stamp which is in string format to date-time object.Syntax: datetime.strptime(time_data, format_data)Parameter:time_data is the time present in string formatformat_data is the data present in datetime format which is 7 min read Python | time.time() methodTime module in Python provides various time-related functions. This module comes under Python’s standard utility modules. time.time() method of Time module is used to get the time in seconds since epoch. The handling of leap seconds is platform dependent. Note: The epoch is the point where the time 2 min read Python datetime.timetz() Method with ExampleThe timetz() function manipulates the objects of the DateTime class of the DateTime module. This function uses an instance method given to it via reference, and converts them, and returns a time object with the same hour, minute, second, microsecond, and fold and tzinfo attributes. Syntax: timetz() 3 min read Python - datetime.toordinal() Method with Exampledatetime.toordinal() is a simple method used to manipulate the objects of DateTime class. It returns proleptic Gregorian ordinal of the date, where January 1 of year 1 has ordinal 1. The function returns the ordinal value for the given DateTime object. If January 1 of year 1 has ordinal number 1 the 2 min read Get UTC timestamp in PythonUTC timestamp represents a specific point in time as measured from the "Unix epoch" — January 1, 1970, 00:00:00 UTC. This timestamp is often used in computing because it is not affected by time zones or daylight saving time, providing a consistent reference time across the globe. When working with t 3 min read Python datetime.utcoffset() Method with ExampleThe utcoffset() function is used to return a timedelta object that represents the difference between the local time and UTC time.This function is used in used in the datetime class of module datetime.Here range of the utcoffset is "-timedelta(hours=24) <= offset <= timedelta(hours=24)".If the 3 min read Timedelta classPython DateTime - Timedelta ClassTimedelta class is used for calculating differences between dates and represents a duration. The difference can both be positive as well as negative. Syntax: class datetime.timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0) Example: Python3 # Timedelta function 3 min read Python - Timedelta object with negative valuesIn Python, there is the Datetime library which is the in-built library under which timedelta() function is present. Using this function we can find out the future date and time or past date and time. In timedelta() object delta represents the difference between two dates or times. Syntax: datetime.t 5 min read Date difference in minutes in PythonTo calculate the date difference in minutes in Python, subtract two datetime objects to get the time difference. Then, convert that difference into minutes or break it down into minutes and seconds based on your needs. For example: for two dates, 2025-05-03 18:45:00 and 2025-05-03 16:30:00, the time 3 min read Python | datetime.timedelta() functionPython timedelta() function is present under datetime library which is generally used for calculating differences in dates and also can be used for date manipulations in Python. It is one of the easiest ways to perform date manipulations. Syntax : datetime.timedelta(days=0, seconds=0, microseconds=0 4 min read Python timedelta total_seconds() Method with ExampleThe total_seconds() function is used to return the total number of seconds covered for the specified duration of time instance. This function is used in the timedelta class of module DateTime. Syntax: total_seconds() Parameters: This function does not accept any parameter. Return values: This functi 2 min read datetime.tzinfo() in Python datetime.tzinfo() class is an abstract base class in Python that provides the interface for working with time zone information. The tzinfo class itself does not store any time zone data; instead, it is intended to be subclassed. The subclass can provide the logic to convert datetime objects to and f 3 min read Handling timezone in Python There are some standard libraries we can use for timezones, here we'll use pytz. This library has a timezone class for handling arbitrary fixed offsets from UTC and timezones. Installation pytz is a third-party package that you have to install. To install pytz use the following command - pip install 4 min read Like