Python: Find the date of the first Monday of a given week

Last update on April 22 2025 12:47:34 (UTC/GMT +8 hours)

14. First Monday Finder

Write a Python program to find the date of the first Monday of a given week.

Sample Solution:

Python Code:

# Import the time module
import time

# Convert the given date string '2015 50 1' into a struct_time object using time.strptime()
# The date string format is specified as '%Y %W %w', representing year, ISO week number, and weekday respectively
# Then, convert the struct_time object to a string representation of the date and time using time.asctime()
# and print it
print(time.asctime(time.strptime('2015 50 1', '%Y %W %w')))

Output:

Mon Dec 14 00:00:00 2015

Explanation:

In the exercise above,

The code imports the "time" module.
Parsing the Date String:

It takes the date string '2015 50 1' representing the year, ISO week number, and weekday respectively.
The "strptime()" function from the "time" module parses this date string into a struct_time object according to the specified format '%Y %W %w', where:

%Y represents the year with the century as a decimal number.
%W represents the ISO week number of the year.
%w represents the weekday as a decimal number, where Monday is 0 and Sunday is 6.

Formatting and printing results:

The parsed "struct_time" object is then converted back to a string representation of the date and time using the "asctime()" function from the "time" module.
Finally, it prints the string representation of the parsed date and time.

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to find the date of the first Monday in a given ISO week and year.
Write a Python script to compute the first Monday for a specified week number and then format the date as "Day, DD Month YYYY".
Write a Python program to determine the first Monday of a given week and verify if it falls in the same month as the provided week.
Write a Python function to calculate the first Monday of a week, then compare it with the first day of that month to see if they match.

Go to:

Previous: Write a Python program to get week number.
Next: Write a Python program to select all the Sundays of a specified year.

Python Code Editor:

Contribute your code and comments through Disqus.