Python | Pandas Series.dt.is_month_start

Series.dt can be used to access series values ​​as datetimelike and return multiple properties. Series.dt.is_month_start Pandas Series.dt.is_month_start returns a boolean indicating whether the date is the first day month.

Syntax: Series.dt.is_month_start

Parameter: None

Returns: numpy array

Example # 1: Use the Series.dt.is_month_start attribute to check if whether the dates in the underlying data of this series object are the beginning of the month or not.

# import pandas as pd

import pandas as pd

 
# Create series

sr = pd.Series ([ `2012-1-1` , ` 2019-7-18 12: 30` , `2008-02-2 10: 30` ,

`2010-4-22 09:25` , `2019-1-1 00:00` ])

 
# Create index

idx = [ `Day 1` , `Day 2` , ` Day 3` , `Day 4` , `Day 5` ]

  
# set index

sr.index = idx

  
# Convert base data to date and time

sr = pd.to_datetime (sr)

 
# Print series

print (sr)

Output:

Now we will use the Series.dt.is_month_start attribute to check if the dates in the given series object are the beginning of the month or not.

# check if dates are the beginning
# of month or not

result = sr.dt.is_month_start

 
# print the result

print (result)

Output:

As we can see from the output, the Series.dt.is_month_start successfully accessed and returned a boolean indicating whether the dates are the start of the month or not.

Example # 2: Use the Series.dt.is_month_start to check if the dates in the underlying data of this series object are the beginning of the month or not.

# import pandas as pd

import pandas as pd

 
# Create series

sr = pd.Series (pd.date_range ( `2012-3-1 00:00` ,

  periods = 5 , freq = `W` ))

  
# Create index

idx = [ ` Day 1` `Day 2` , ` Day 3` , `Day 4` , ` Day 5` ]

 
# set index

sr.index = idx

  
# Print series

print (sr)

Output:

We will now use the Series.dt.is_month_start attribute to check if the dates in the given series object are the beginning of the month or not.

# check if dates are start
No. of month or not

result = sr.dt.is_month_start

 
# print the result

print (result)

Output:

As we can see from the output, the Series.dt.is_month_start attribute successfully accessed and returned boolean values ​​indicating whether date is the beginning of the month or not.