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Python – Iterating through a range of dates

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  • Last Updated : 28 Nov, 2021

In this article, we will discuss how to iterate DateTime through a range of dates.

Method 1: Using loop and timedelta

Timedelta is used to get the dates and loop is to iterate the date from the start date to end date

Syntax:

delta = datetime.timedelta(days=1)
while (start_date <= end_date):
    print(start_date)
    start_date += delta

Example: Python code to display the dates from 2021 – Feb 1st to 2021 – March 1st

Python3




# import datetime module
import datetime
  
# consider the start date as 2021-february 1 st
start_date = datetime.date(2021, 2, 1)
  
# consider the end date as 2021-march 1 st
end_date = datetime.date(2021, 3, 1)
  
# delta time
delta = datetime.timedelta(days=1)
  
# iterate over range of dates
while (start_date <= end_date):
    print(start_date, end="\n")
    start_date += delta

Output:

2021-02-01
2021-02-02
2021-02-03
2021-02-04
2021-02-05
2021-02-06
2021-02-07
2021-02-08
2021-02-09
2021-02-10
2021-02-11
2021-02-12
2021-02-13
2021-02-14
2021-02-15
2021-02-16
2021-02-17
2021-02-18
2021-02-19
2021-02-20
2021-02-21
2021-02-22
2021-02-23
2021-02-24
2021-02-25
2021-02-26
2021-02-27
2021-02-28
2021-03-01

Method 2: Using pandas

We can use the date_range() function method that is available in pandas. It is used to return a fixed frequency DatetimeIndex.

Syntax:

pandas.date_range(start, end)

where

  • start is the starting date
  • end is the ending date

We can iterate to get the date using date() function.

Example:

Python3




# import pandas module
import pandas as pd
  
# specify the start date is 2021 jan 1 st
# specify the emd date is 2021 feb 1 st
a = pd.date_range(start='1/1/2021', end='2/1/2021')
  
# display only date using date() function
for i in a:
    print(i.date())

Output:

2021-01-01
2021-01-02
2021-01-03
2021-01-04
2021-01-05
2021-01-06
2021-01-07
2021-01-08
2021-01-09
2021-01-10
2021-01-11
2021-01-12
2021-01-13
2021-01-14
2021-01-15
2021-01-16
2021-01-17
2021-01-18
2021-01-19
2021-01-20
2021-01-21
2021-01-22
2021-01-23
2021-01-24
2021-01-25
2021-01-26
2021-01-27
2021-01-28
2021-01-29
2021-01-30
2021-01-31
2021-02-01

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