====== YearDay(date) ======
Category:  Date and Time function

\\ 
=====Description=====
This function returns the number of days since January 1st of year //date// falls in.

\\ 
=====Arguments=====
^Argument^Type^Description^
|date|Date or Number (date serial)|An expression representing a date from which the number of days since Jan 1st is calculated.|

**Return value type:** Number (Integer).

\\ 
=====Remarks=====
//YearDay// does account for Leap Years in its calculation.

The argument, //date//, is included in the return value. See Examples, below.


\\ 
=====Examples=====
  yearday(#2005-01-01)  //Returns 1.

  yearday(#2017-05-25)  //Returns 145.

  yearday(#2000-12-31)  //Returns 366.  (A Leap Year.)
  yearday(#2001-12-31)  //Returns 365.  (A non-Leap Year.)
  
 
\\ 
=====See also=====
  * [[syntax:functions:day|Day(date)]]
  * [[syntax:functions:month|Month(date)]]
  * [[syntax:functions:weekday|Weekday(date)]]