Python Pandas - Return proleptic Gregorian ordinal

To return proleptic Gregorian ordinal, use the timestamp.toordinal() method. At first, import the required libraries −

import pandas as pd

Create the timestamp object in Pandas

timestamp = pd.Timestamp(2021, 9, 18, 11, 50, 20, 33)

Return proleptic Gregorian ordinal. Example: January 1 of year 1 is day 1

timestamp.toordinal()

Example

Following is the code

import pandas as pd

# set the timestamp object in Pandas
timestamp = pd.Timestamp(2021, 9, 18, 11, 50, 20, 33)

# display the Timestamp
print("Timestamp...\n", timestamp)

# Return proleptic Gregorian ordinal.
# Example: January 1 of year 1 is day 1.
print("\nGregorian ordinal...\n", timestamp.toordinal())

Output

This will produce the following code

Timestamp...
 2021-09-18 11:50:20.000033

Gregorian ordinal...
 738051