DAYReturns the day of the month that a specific date falls on, in numeric format.
date – The date from which to extract the day. Must be a reference to a cell containing a date, a function returning a date type, or a number.
Ensure that the input to the function is either a reference to a cell containing a date, a function which returns a date object such as DATE, DATEVALUE or TO_DATE, or a date serial number of the type returned by the N function. Google Sheets represents dates and times as numbers; while conversion is automatic when a human-readable date is entered into a cell, functions only accept literal dates in numeric format.
DAY does not autoconvert number formats in the same way that Google Sheets does upon direct entry into cells. Therefore, DAY(10/10/2000) is interpreted as DAY(0.005), the quotient of 10 divided by 10 divided by 2000.
DAY returns the intuitive understanding of the day of the month, and is useful primarily in other calculations rather than to extract the day of month from a known date, as that value is easily known from reading the entire date.
YEAR: Returns the year specified by a given date.
WEEKDAY: Returns a number representing the day of the week of the date provided.
TO_DATE: Converts a provided number to a date.
SECOND: Returns the second component of a specific time, in numeric format.
N: Returns the argument provided as a number.
MONTH: Returns the month of the year a specific date falls in, in numeric format.
MINUTE: Returns the minute component of a specific time, in numeric format.
HOUR: Returns the hour component of a specific time, in numeric format.
DATEVALUE: Converts a provided date string in a known format to a date value.
DATE: Converts a year, month, and day into a date.
DAY accepts different input parameter type.