daynumberofyear - script and chart function

This function calculates the day number of the year in which a timestamp falls. The calculation is made from the first millisecond of the first day of the year, but the first month can be offset.

Syntax:

DayNumberOfYear(timestamp[,start_month])

Return data type: integer

Arguments
Argument	Description
timestamp	The date or timestamp to evaluate.
start_month	By specifying a start_month between 2 and 12 (1, if omitted), the beginning of the year may be moved forward to the first day of any month. For example, if you want to work with a fiscal year starting March 1, specify start_month = 3.

These examples use the date format DD/MM/YYYY. The date format is specified in the SET DateFormat statement at the top of your data load script. Change the format in the examples to suit your requirements.

Function examples
Example	Result
DayNumberOfYear( '12/09/2014' )	Returns 256, the day number counted from the first of the year.
DayNumberOfYear( '12/09/2014',3 )	Returns 196, the number of the day, as counted from 1 March.

Example 1 – January start of year (script)

Overview

Open the Data load editor and add the load script below to a new tab.

The load script contains:

A simple dataset containing a list of dates, which is loaded into a table named Calendar. The default DateFormat system variable MM/DD/YYYY is used.
A preceding load that creates an additional field, named daynryear, using the DayNumberOfYear() function.

Aside from the date, no additional parameters are provided to the function.

Load script

SET DateFormat='MM/DD/YYYY'; 

Calendar: 
Load 
	date, 
	DayNumberOfYear(date) as daynryear
	;
Load
date
Inline
[ 
date
01/01/2022
01/10/2022
01/31/2022
02/01/2022
02/10/2022
06/30/2022
07/26/2022
10/31/2022
11/01/2022
12/31/2022
];

Results

Load the data and open a sheet. Create a new table and add these fields as dimensions:

date
daynryear

Results table
date	daynryear
01/01/2022	1
01/10/2022	10
01/31/2022	31
02/01/2022	32
02/10/2022	41
06/30/2022	182
07/26/2022	208
10/31/2022	305
11/01/2022	306
12/31/2022	366

The first day of the year is the 1st of January because no second argument was passed into the DayNumberOfYear() function.

January 1st is the 1st day of the quarter whilst February 1st is the 32nd day of the year. The 30th of June is the 182nd whilst the 31st of December is the 366th and final day of the year.

Example 2 – November start of year (script)

Overview

Open the Data load editor and add the load script below to a new tab.

The load script contains:

The same dataset from the first example.
The default DateFormat system variable MM/DD/YYYY is used
A start_month argument beginning on November 1. This sets the financial year to November 1.

Load script


SET DateFormat='MM/DD/YYYY'; 

Calendar: 
Load 
	date, 
	DayNumberOfYear(date,11) as daynryear
	;
Load
date
Inline
[ 
date
01/01/2022
01/10/2022
01/31/2022
02/01/2022
02/10/2022
06/30/2022
07/26/2022
10/31/2022
11/01/2022
12/31/2022
];

Results

Load the data and open a sheet. Create a new table and add these fields as dimensions:

date
daynryear

Results table
date	daynryear
01/01/2022	62
01/10/2022	71
01/31/2022	92
02/01/2022	93
02/10/2022	102
06/30/2022	243
07/26/2022	269
10/31/2022	366
11/01/2022	1
12/31/2022	61

The first day of the year is the 1st of November because the second argument passed into the DayNumberOfYear() function was 11.

January 1st is the 1st day of the quarter whilst February 1st is the 32nd day of the year. The 30th of June is the 182nd whilst the 31st of December is the 366th and final day of the year.

Example 3 – January start of year (chart)

Overview

Open the Data load editor and add the load script below to a new tab.

The load script contains:

The same dataset from the first example.
The default DateFormat system variable MM/DD/YYYY is used.

However, in this example, the unchanged dataset is loaded into the application. The value of the day of the quarter is calculated via a measure in a chart object.

Load script

SET DateFormat='MM/DD/YYYY';
						
Calendar:
Load
date
Inline
[
date
01/01/2022
01/10/2022
01/31/2022
02/01/2022
02/10/2022
06/30/2022
07/26/2022
10/31/2022
11/01/2022
12/31/2022
];

Results

Load the data and open a sheet. Create a new table and add this field as a dimension: date.

Create the following measure:

=daynumberofyear(date)

Results table
date	=daynumberofyear(date)
01/01/2022	1
01/10/2022	10
01/31/2022	31
02/01/2022	32
02/10/2022	41
06/30/2022	182
07/26/2022	208
10/31/2022	305
11/01/2022	306
12/31/2022	366

The first day of the year is the 1st of January because no second argument was passed into the DayNumberOfYear() function.

January 1st is the 1st day of the year whilst February 1st is the 32nd day of the year. The 30th of June is the 182nd whilst the 31st of December is the 366th and final day of the year.

Example 4 – November start of year (chart)

Overview

Open the Data load editor and add the load script below to a new tab.

The load script contains:

The same dataset from the first example.
The default DateFormat system variable MM/DD/YYYY is used.
The financial year runs from the 1st of November to the 31st of October.

However, in this example, the unchanged dataset is loaded into the application. The value of the day of the year is calculated via a measure in a chart object.

Load script


SET DateFormat='MM/DD/YYYY';
Calendar:
Load
date
Inline
[
date
01/01/2022
01/10/2022
01/31/2022
02/01/2022
02/10/2022
06/30/2022
07/26/2022
10/31/2022
11/01/2022
12/31/2022
];

Results

Load the data and open a sheet. Create a new table and add this field as a dimension: date.

Create the following measure:

=daynumberofyear(date)

Results table
date	=daynumberofyear(date,11)
01/01/2022	62
01/10/2022	71
01/31/2022	92
02/01/2022	93
02/10/2022	102
06/30/2022	243
07/26/2022	269
10/31/2022	366
11/01/2022	1
12/31/2022	61

The first day of the year is the 1st of November because the second argument passed into the DayNumberOfYear() function was 11.

The financial year operates between November and October. This is shown in the results table where November 1st is the 1st day of the year whilst October 31st is the 366th and last day of the year.

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