NumPy: Get the dates of yesterday, today and tomorrow

Last update on April 29 2025 12:55:49 (UTC/GMT +8 hours)

2. Yesterday, Today, Tomorrow Dates

Write a NumPy program to get the dates of yesterday, today and tomorrow.

Sample Solution:-

Python Code:

# Importing necessary libraries
import numpy as np

# Calculating yesterday's date using NumPy's datetime64 and timedelta64
yesterday = np.datetime64('today', 'D') - np.timedelta64(1, 'D')
print("Yestraday: ", yesterday)

# Calculating today's date using NumPy's datetime64
today = np.datetime64('today', 'D')
print("Today: ", today)

# Calculating tomorrow's date using NumPy's datetime64 and timedelta64
tomorrow = np.datetime64('today', 'D') + np.timedelta64(1, 'D')
print("Tomorrow: ", tomorrow)

Sample Output:

Yestraday:  2017-03-24                                                 
Today:  2017-03-25                                                     
Tomorrow:  2017-03-26

Explanation:

In the above code –

yesterday = np.datetime64('today', 'D') - np.timedelta64(1, 'D'): In this code yesterday is a variable that holds the date value of yesterday. This is achieved by subtracting one day from today's date using the np.timedelta64() function with the argument '1D', which represents one day.

today = np.datetime64('today', 'D'): In this code today is a variable that holds today's date.

tomorrow = np.datetime64('today', 'D') + np.timedelta64(1, 'D'): In this code tomorrow is a variable that holds the date value of tomorrow. This is achieved by adding one day to today's date using the np.timedelta64() function with the argument '1D'.

Pictorial Presentation:

NumPy: Get the dates of yesterday, today and tomorrow.

For more Practice: Solve these Related Problems:

Compute yesterday, today, and tomorrow using np.datetime64('today') and np.timedelta64 and return them in ISO format.
Create a function that, given a reference date, returns a tuple with yesterday, today, and tomorrow computed via date arithmetic.
Display the dates of yesterday, today, and tomorrow, and calculate the day differences between them using np.datetime64.
Convert the resulting dates to Python datetime.datetime objects and verify the conversion accuracy.

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Next: Write a NumPy program to count the number of days of a given month.

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