# Days in year / Cal accounting for leap year

edited 12/09/19

Hi

Need to determine how many days in the current year (365 or 366) to be used in a calculation. Can anyway suggest how to determine how many days in the current year?

Cheers

Simon

## Comments

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There are a few ways do do this. The most straightforward being

=YEARDAY(DATE(2019, 12, 31))

This will give you the year day (1 - 365 or 366) for whatever date you specify. In this case it would be the last day of the year.

You can automate the date to look at this year, next year, previous year, etc, you can leave it as manual entry within the formula, or you can use various options for cell referencing to change the entire date or the year, or many other possibilities.

• Or, if you just want a simple Yes/No (is this year a leap year), divide the current year by 4, then compare that to the integer version.

"Int(currentYear/4)=currentYear/4" should return a True/False matching "Is this year a leap year"

• Thanks Paul and Corey, based on your input i used the below:

=YEARDAY(DATE(YEAR([Due Date]1), 12, 31))  = 365 or 366

Provides number of days in year, based on the date contained in another cell [Due Date].

Cheers

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Excellent Use. Happy to help!