# Convert Year/Month/Day to Day of Year in Python

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I"m using the `datetime` module, i.e.:

``````>>> import datetime
>>> today = datetime.datetime.now()
>>> print(today)
2009-03-06 13:24:58.857946
``````

and I would like to compute the day of year that takes leap years into account. e.g. today (March 6, 2009) is the 65th day of 2009.

I see a two options:

1. Create a `number_of_days_in_month = [31, 28, ...]` array, decide if it"s a leap year and manually sum up the days.

2. Use `datetime.timedelta` to make a guess & then binary search for the correct day of the year:

``````>>> import datetime
>>> YEAR = 2009
>>> DAY_OF_YEAR = 62
>>> d = datetime.date(YEAR, 1, 1) + datetime.timedelta(DAY_OF_YEAR - 1)
``````

These both feel pretty clunky & I have a gut feeling that there"s a more "Pythonic" way of calculating the day of the year. Any ideas/suggestions?

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## Convert Year/Month/Day to Day of Year in Python __del__: Questions

How can I make a time delay in Python?

I would like to know how to put a time delay in a Python script.

2973

``````import time
time.sleep(5)   # Delays for 5 seconds. You can also use a float value.
``````

Here is another example where something is run approximately once a minute:

``````import time
while True:
print("This prints once a minute.")
time.sleep(60) # Delay for 1 minute (60 seconds).
``````

2973

You can use the `sleep()` function in the `time` module. It can take a float argument for sub-second resolution.

``````from time import sleep
sleep(0.1) # Time in seconds
``````

## Convert Year/Month/Day to Day of Year in Python __del__: Questions

How to delete a file or folder in Python?

How do I delete a file or folder in Python?

2639

`Path` objects from the Python 3.4+ `pathlib` module also expose these instance methods:

We hope this article has helped you to resolve the problem. Apart from Convert Year/Month/Day to Day of Year in Python, check other __del__-related topics.

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Oliver Jackson

Munchen | 2023-03-24

Thanks for explaining! I was stuck with Convert Year/Month/Day to Day of Year in Python for some hours, finally got it done 🤗. I just hope that will not emerge anymore

Marie Schteiner

Shanghai | 2023-03-24

Simply put and clear. Thank you for sharing. Convert Year/Month/Day to Day of Year in Python and other issues with io Python module was always my weak point 😁. Will get back tomorrow with feedback

Anna Krasiko

Tallinn | 2023-03-24

Simply put and clear. Thank you for sharing. Convert Year/Month/Day to Day of Year in Python and other issues with tty Python module was always my weak point 😁. Will use it in my bachelor thesis

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