Almost every software application works with dates and time. Whether you’re building an attendance system, booking application, e-commerce platform, AI logging system, banking software, or social media application, managing date and time correctly is essential.

Python provides powerful built-in modules such as datetime, time, and calendar that help developers work with dates, timestamps, durations, scheduling, and time calculations efficiently.

In this lesson, you’ll learn how to create dates and times, format them, calculate differences between dates, work with timestamps, and build practical applications using Python’s date and time modules.

By the end of this lesson, you’ll confidently manage date and time operations in professional Python applications.

Learning Objectives

After completing this lesson, you will be able to:

• Understand Python’s date and time modules.
• Work with the datetime module.
• Format dates and times.
• Calculate date differences.
• Use timestamps.
• Work with calendars.
• Build scheduling applications.
• Apply date and time concepts in real-world projects.

Topics Covered

• Introduction to Date & Time
• datetime Module
• date Object
• time Object
• Current Date & Time
• Formatting Dates
• Date Arithmetic
• Timestamps
• calendar Module
• Real-World Applications
• Best Practices

Detailed Lesson Content

Introduction to Date & Time

Imagine you’re building an Online Course Management System.

The application needs to manage:

• Student registration date
• Course start date
• Assignment deadlines
• Exam schedules
• Attendance timestamps
• Certificate issue dates

All these features rely on accurate date and time management.

Python provides built-in modules to make these operations simple and reliable.

Importing the datetime Module

from datetime import datetime

The datetime module is the most commonly used module for working with dates and times.

Getting Current Date and Time

Example

from datetime import datetime

now = datetime.now()

print(now)

Output

2026-07-10 15:45:21.678921

The output includes:

• Year
• Month
• Day
• Hour
• Minute
• Second
• Microsecond

Getting Current Date

from datetime import date

today = date.today()

print(today)

Output

2026-07-10

Getting Current Time

from datetime import datetime

current_time = datetime.now().time()

print(current_time)

Output

15:45:21.678921

Accessing Individual Components

from datetime import datetime

now = datetime.now()

print(now.year)
print(now.month)
print(now.day)
print(now.hour)
print(now.minute)
print(now.second)

Output

2026
7
10
15
45
21

Creating a Specific Date

from datetime import datetime

exam = datetime(2026,12,15,10,30)

print(exam)

Output

2026-12-15 10:30:00

Formatting Dates

Use the strftime() method.

Example

from datetime import datetime

today = datetime.now()

print(today.strftime("%d-%m-%Y"))

Output

10-07-2026

Common Format Codes

Converting String to Date

Use strptime().

Example

from datetime import datetime

date_string = "15-12-2026"

exam = datetime.strptime(date_string,"%d-%m-%Y")

print(exam)

Output

2026-12-15 00:00:00

Date Arithmetic

from datetime import datetime

today = datetime.now()

future = datetime(2026,12,31)

difference = future - today

print(difference.days)

Output

174

Python automatically calculates the number of days.

Using timedelta

from datetime import datetime, timedelta

today = datetime.now()

next_week = today + timedelta(days=7)

print(next_week)

Output

2026-07-17

Working with Timestamps

A timestamp represents the number of seconds since January 1, 1970 (Unix Epoch).

from datetime import datetime

timestamp = datetime.now().timestamp()

print(timestamp)

Example Output

1783698325.55

Converting Timestamp to Date

from datetime import datetime

timestamp = 1783698325

date = datetime.fromtimestamp(timestamp)

print(date)

Working with calendar Module

Import calendar

import calendar

Display current month

import calendar

print(calendar.month(2026,7))

Output

     July 2026

Mo Tu We Th Fr Sa Su
...

Finding Leap Year

import calendar

print(calendar.isleap(2028))

Output

True

Real-World Example 1: Student Attendance

from datetime import datetime

attendance_time = datetime.now()

print("Attendance Recorded At:")

print(attendance_time)

Real-World Example 2: Certificate Generation

from datetime import date

issue_date = date.today()

print("Certificate Issued On:")

print(issue_date)

Real-World Example 3: Event Countdown

from datetime import datetime

today = datetime.now()

event = datetime(2026,12,31)

remaining = event - today

print(remaining.days)

Real-World Example 4: Digital Clock

from datetime import datetime

while True:

    print(

        datetime.now().strftime("%H:%M:%S")

    )

    break