How to convert Year and Day of Year to Date in python?

How to convert Year and Day of Year to Date in python?

You can convert a year and day of the year (DOY) to a date in Python using the datetime module. Here's how you can do it:

from datetime import datetime, timedelta def convert_year_and_doy_to_date(year, doy): # Create a datetime object for the given year and the first day of that year date = datetime(year, 1, 1) # Add the number of days (DOY - 1) to the date date += timedelta(days=doy - 1) return date # Example usage: year = 2023 doy = 120 # Day of the year result_date = convert_year_and_doy_to_date(year, doy) print(result_date)

In this example:

  1. We import the datetime module.

  2. We define a function convert_year_and_doy_to_date that takes a year and day of the year (DOY) as input.

  3. We create a datetime object for the given year, initializing it to the first day of that year (January 1).

  4. We then add the number of days (DOY - 1) to the date using the timedelta object. Note that we subtract 1 from the DOY because we started with January 1.

  5. The function returns the resulting date.

By calling convert_year_and_doy_to_date(year, doy), you can convert a year and day of the year to a date. The result_date variable will hold the corresponding date.

Examples

  1. Convert Year and Day of Year to Date using datetime module:

    Description: Utilize the datetime module to convert a year and day of the year to a date.

    from datetime import datetime # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = datetime(year, 1, 1) + timedelta(days=day_of_year - 1)

  2. Convert Year and Day of Year to Date using arrow library:

    Description: Use the arrow library to easily convert a year and day of the year to a date.

    import arrow # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = arrow.get(f'{year}-01-01').shift(days=day_of_year - 1).date()

  3. Convert Year and Day of Year to Date using pandas library:

    Description: Utilize the pandas library to convert a year and day of the year to a date.

    import pandas as pd # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = pd.to_datetime(f'{year}-01-01') + pd.DateOffset(days=day_of_year - 1)

  4. Convert Year and Day of Year to Date using dateutil.parser module:

    Description: Use the dateutil.parser module to parse a string representation of the date.

    from dateutil.parser import parse # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = parse(f'{year}-01-01') + timedelta(days=day_of_year - 1)

  5. Convert Year and Day of Year to Date using calendar module:

    Description: Utilize the calendar module to convert a year and day of the year to a date.

    import calendar # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = datetime.strptime(f'{year} {day_of_year}', '%Y %j')

  6. Convert Year and Day of Year to Date using strftime and strptime:

    Description: Use strftime to format the date string and strptime to parse it back into a date object.

    from datetime import datetime # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date_str = f'{year}-01-01' date = datetime.strptime(date_str, '%Y-%m-%d') + timedelta(days=day_of_year - 1)

  7. Convert Year and Day of Year to Date using custom function:

    Description: Create a custom function to handle the conversion of year and day of the year to a date.

    from datetime import datetime, timedelta # Custom function to convert Year and Day of Year to Date def year_day_to_date(year, day_of_year): return datetime(year, 1, 1) + timedelta(days=day_of_year - 1) # Usage year = 2022 day_of_year = 150 date = year_day_to_date(year, day_of_year)

  8. Convert Year and Day of Year to Date using julian library:

    Description: Utilize the julian library to convert Julian day to a date.

    import julian # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = julian.to_datetime(year, day_of_year)

  9. Convert Year and Day of Year to Date using timedelta:

    Description: Use timedelta to add the number of days to January 1st of the given year.

    from datetime import datetime, timedelta # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = datetime(year, 1, 1) + timedelta(days=day_of_year - 1)

  10. Convert Year and Day of Year to Date using numpy and pandas:

    Description: Use numpy and pandas libraries to convert Year and Day of Year to a date.

    import numpy as np import pandas as pd # Convert Year and Day of Year to Date year = 2022 day_of_year = 150 date = pd.Timestamp(f'{year}-01-01') + pd.DateOffset(days=day_of_year - 1)

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