getDayOfYear

The getDayOfYear() function returns the day of the year (1–366) for a TheDate, taking an optional timezone into account.

Interactive example

Syntax

function getDayOfYear<
	GenericInput extends TheDate | SerializedTheDate
>(
	input: GenericInput,
	timezone: Timezone = "UTC"
): number

Parameters

• input: TheDate or SerializedTheDate.
• timezone: IANA timezone. Default: "UTC".

Return value

An integer between 1 and 366.

See also

• getWeekOfYear
• getDayOfMonth

Sources

• MDN Web Docs - Date