getFirstDayOfMonth

The getFirstDayOfMonth() function returns the first day of the month (as TheDate) for the provided date input.

Interactive example

Syntax

function getFirstDayOfMonth<
	GenericInput extends TheDate | SerializedTheDate
>(
	input: GenericInput
): TheDate

Parameters

• input: TheDate or SerializedTheDate.

Return value

A TheDate set to the first day of the month (at midnight UTC).

See also

• getLastDayOfMonth
• getDayOfMonth

Sources

• MDN Web Docs - Date