Python program to find birthdate on the same day you were born

11 Dec, 2019
Write a program to find birthdates till a given year on the same day you were born. Let the input be of the format: YYYY-MM-DD
Examples:
Input: 1996-11-12Output: [‘1996-11-12’, ‘2002-11-12’, ‘2013-11-12’, ‘2019-11-12’, ‘2024-11-12’, ‘2030-11-12’, ‘2041-11-12’, ‘2047-11-12’]
Input: 1992-11-2Output: [‘1992-11-2’, ‘1998-11-2’, ‘2009-11-2’, ‘2015-11-2’, ‘2020-11-2’, ‘2026-11-2’, ‘2037-11-2’, ‘2043-11-2’, ‘2048-11-2’]
Functions created:
split_date(birthdate): This function splits the date given by user into year, month and day.
get_birthday(birthdate): This function is used to return the day of the week the user was born.
true_birthdays(birthdate): This function is used to return a list of dates having the same week day the user was born.
To find the birthdates having the same day the user was born above three methods will help us. Firstly, The user will enter the date and split_date() function will split the date into year, month and day. Then the function get_birthday() will be used to find weekday for that particular date. Finally, the true_birthdays() function will be used to find the list of all the dates having the same weekday. Inside this function, a for loop will be iterating from birth year to a specific year and will check if the birthdate in any particular year having the same weekday or not. If the weekday is same then that date will be added to the list of dates.
Below is the implementation.
import datetimeimport calendar  weekdays = ["Monday", "Tuesday", "Wednesday",            "Thursday", "Friday", "Saturday", "Sunday"]       # get_birth daydef split_date(birthday):      # Split it to year, month and day    year, month, day = birthday.split('-')        return year, month, day        def get_birthday(birthday):      year, month, day = split_date(birthday)      # Get a date object for the day of birth    bdate = datetime.datetime(int(year), int(month), int(day))      # Get the integer weekday for the day of birth    weekday = bdate.weekday()      # Tell the user    day = weekdays[weekday]      return day       def listToString(x):      # initialize an empty string     String = " "       # return string       return (String.join(x))    def true_birthdays(birthdate):    year, month, day = split_date(birthdate)      # get the year from birthday    year = birthdate[:4].split('-')      # convert list to string       year = listToString(year)      # get the weekday you are born    d_day = get_birthday(birthdate)       # list of true birthdate[birthday that have same     # weekday as the day you were born]        true_BD = []           j = 0      for i in range(int(year), 2050):          # add + j to birth year         new_year = int(year)+j           # construct new birthday        new_birthday = str(str(new_year)+"-"+month+"-"+day)           # get weekday of the new birthday        new_d_day = get_birthday(new_birthday)          # if birthday that have same weekday         # as the day you were born        if d_day == new_d_day:           # add to the list of true birthdate            true_BD.append(new_birthday)        else:            pass        j += 1      return true_BD    def main():      # Get the birth date    birthdate = "1996-11-12"      # year_limit = input("search limit from your birthday- ")    dates = true_birthdays(birthdate)            print(dates)        # Driver's codemain()
Output:
[‘1996-11-12’, ‘2002-11-12’, ‘2013-11-12’, ‘2019-11-12’, ‘2024-11-12’, ‘2030-11-12’, ‘2041-11-12’, ‘2047-11-12’]
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