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How to add time onto a DateTime object in Python

Last Updated : 23 Jul, 2025

In Python, adding time (such as hours, minutes, seconds, or days) to a datetime object is commonly done using the timedelta class from the datetime module. This allows precise manipulation of date and time values, including performing arithmetic operations on datetime objects. It's key features include:

  • Add or subtract specific time durations to/from datetime objects.
  • Supports various time units like days, seconds, microseconds, minutes, hours and weeks.
  • Useful for time calculations, scheduling and generating timestamps.

Example:


Output
Now: 2025-05-24 06:00:32.837564
In 10 days: 2025-06-03 06:00:32.837564

Explanation:

  • datetime.now() captures the current date and time.
  • a + timedelta(days=10) adds 10 days to the current datetime a to get the future datetime b.

Syntax

datetime.timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)

Parameters:

Parameter

Description

days

Number of days

seconds

Number of seconds

microseconds

Number of microseconds

milliseconds

Number of milliseconds (converted to microseconds)

minutes

Number of minutes (converted to seconds)

hours

Number of hours (converted to seconds)

weeks

Number of weeks (converted to days)

Returns: This method returns a datetime.timedelta object which represents a duration (not an absolute date). This object can be added to or subtracted from datetime.datetime or datetime.date objects to perform date/time arithmetic.

Examples

Example 1: Add 1 day to a datetime object


Output
Original: 2025-05-24 10:00:00
After Adding 1 Day: 2025-05-25 10:00:00

Explanation: datetime(2025, 5, 24, 10, 0, 0) creates a specific datetime object for May 24, 2025, 10:00:00 AM and a + timedelta(days=1) adds 1 day to the datetime a, resulting in b.

Example 2: Add hours and minutes


Output
Updated Datetime: 2025-05-24 16:45:00

Explanation: datetime(2025, 5, 24, 14, 30) creates a specific datetime object for May 24, 2025, 2:30 PM and a + timedelta(hours=2, minutes=15) adds 2 hours and 15 minutes to the datetime a, resulting in b.

Example 3: Subtract Hours from a Datetime


Output
New Datetime: 2025-05-24 09:00:00

Explanation: datetime(2025, 5, 24, 12, 0) creates a specific datetime object for May 24, 2025, 12:00 PM and a - timedelta(hours=3) subtracts 3 hours from the datetime a, resulting in b.

Example 4: Add weeks, days and hours


Output
Final Datetime: 2025-06-02 14:00:00

Explanation: datetime(2025, 5, 24, 9, 0) creates a datetime object for May 24, 2025, 9:00 AM and a + timedelta(weeks=1, days=2, hours=5) adds 1 week, 2 days and 5 hours to a, resulting in b.

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