datetime.toordinal() is a simple method used to manipulate the objects of DateTime class. It returns proleptic Gregorian ordinal of the date, where January 1 of year 1 has ordinal 1. The function returns the ordinal value for the given DateTime object.
If January 1 of year 1 has ordinal number 1 then, January 2 year 1 will have ordinal number 2, and so on.
Syntax:
datetimeObj.toordinal()
Parameters: None
Returns: Ordinal Value
Given below are some implementations for the same.
Example 1: Use datetime.toordinal() function to return the Gregorian ordinal for the given datetime object using date.today() class of datetime module.
Python3
# Python3 code to demonstrate# Getting Ordinal value using# toordinal().# importing datetime module for today()import datetime# using date.today() to get todays datedateToday = datetime.date.today()# Using toordinal() to generate ordinal value.toOrdinal = dateToday.toordinal()# Prints Ordinal Value of Todays Date.print(f"Ordinal of date {dateToday} is {toOrdinal}") |
Ordinal of date 2021-08-03 is 738005
Note: Attributes of DateTime class should be in given range otherwise it will show a ValueError
Example 2: Example to show the parameters needs to be in the range
Python3
# importing datetime classfrom datetime import datetime# Creating an instance of datetime.dateIs = datetime(189, 0, 0)# Using toordinal() methodtoOrdinal = dateIs.toordinal()print(f"Ordinal value of Earliest Datetime {dateIs} is {toOrdinal}") |
Output:
Traceback (most recent call last):
File “/home/2ecd5f27fbc894dc8eeab3aa6559c7ab.py”, line 5, in <module>
dateIs = datetime(189,0,0)
ValueError: month must be in 1..12
Example 3: Use datetime.toordinal() function to return the Gregorian ordinal for the given DateTime object.
Python3
# importing datetime classfrom datetime import datetime# Creating an instance of datetime.dateIs = datetime(1, 1, 1, 0, 0, 0, 0)# Using toordinal() methodtoOrdinal = dateIs.toordinal()print(f"Ordinal value of Earliest Datetime {dateIs} is {toOrdinal}")print()dateIs = datetime(9999, 12, 31, 23, 59, 59)toOrdinal = dateIs.toordinal()print(f"Ordinal value of Latemost Datetime {dateIs} is {toOrdinal}") |
Output:
Ordinal value of Earliest Datetime 0001-01-01 00:00:00 is 1
Ordinal value of Latemost Datetime 9999-12-31 23:59:59 is 3652059
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