docs-v2/content/flux/v0.x/stdlib/date/yearday.md

title	description	aliases	menu	weight	introduced
date.yearDay() function	The `date.yearDay()` function returns the day of the year for a specified time. Results range from `[1-365]` for non-leap years, and `[1-366]` in leap years.	/influxdb/v2.0/reference/flux/functions/date/yearday/ /influxdb/v2.0/reference/flux/stdlib/date/yearday/ /influxdb/cloud/reference/flux/stdlib/date/yearday/	flux_0_x_ref name parent date.yearDay date	301	0.37.0

The date.yearDay() function returns the day of the year for a specified time. Results include leap days and range from [1-366].

import "date"

date.yearDay(t: 2019-07-17T12:05:21.012Z)

// Returns 198

Parameters

t

The time to operate on. Use an absolute time, relative duration, or integer. Durations are relative to now().

Examples

Return the day of the year for a time value

import "date"

date.yearDay(t: 2020-02-11T12:21:03.293534940Z)

// Returns 42

Return the day of the year for a relative duration

import "date"

option now = () => 2020-02-11T12:21:03.293534940Z

date.yearDay(t: -1mo)

// Returns 11