Python Pandas - Get day of the month that a Period falls on

To get the day of the month that a Period falls on, use the period.day property. This property extracts the day component from a Pandas Period object.

Syntax

The syntax for getting the day of the month is ?

period.day

Creating Period Objects

First, import the required libraries ?

import pandas as pd

# Creating Period objects using different methods
period1 = pd.Period("2021-09-18")
period2 = pd.Period(freq='D', year=2021, month=9, day=22, hour=4, minute=55)

print("Period1:", period1)
print("Period2:", period2)

Period1: 2021-09-18
Period2: 2021-09-22

Extracting Day of the Month

Use the .day property to extract the day component from Period objects ?

import pandas as pd

# Create Period objects
period1 = pd.Period("2021-09-18")
period2 = pd.Period(freq='D', year=2021, month=9, day=22, hour=4, minute=55)

# Get the day of the month from both Period objects
day1 = period1.day
day2 = period2.day

print("Day from Period1:", day1)
print("Day from Period2:", day2)
print("Type:", type(day1))

Day from Period1: 18
Day from Period2: 22
Type: <class 'int'>

Working with Different Frequencies

The .day property works with Period objects of different frequencies ?

import pandas as pd

# Create Period objects with different frequencies
daily = pd.Period("2021-09-15", freq='D')
monthly = pd.Period("2021-09", freq='M')
quarterly = pd.Period("2021Q3", freq='Q')

print("Daily period:", daily, "? Day:", daily.day)
print("Monthly period:", monthly, "? Day:", monthly.day)
print("Quarterly period:", quarterly, "? Day:", quarterly.day)

Daily period: 2021-09-15 ? Day: 15
Monthly period: 2021-09 ? Day: 30
Quarterly period: 2021Q3 ? Day: 30

Conclusion

The .day property provides a simple way to extract the day component from Pandas Period objects. It returns an integer representing the day of the month, regardless of the Period's frequency.