`day`

Day of the month of each datetime value.

Category: Language Fundamentals > Data Types

Syntax

d = day(t)

Returns the day of the month, from 1 to 31.

Description

day(t) is the same as t.Day. It gives the number of the day inside the month, not inside the year or week. For the other parts of a date use month, year, hour, minute and second, or the Year, Month properties of the datetime.

The result is a plain double array, so it can be used directly in comparisons and indexing.

Input arguments

t: datetime array.

Output arguments

d: Numeric array with the size of t.

Example

Days of a range

t = datetime(2020,5,17):datetime(2020,5,19);
day(t)
day(datetime(2020,2,29)) == 29

Output

ans = 1×3

    17    18    19
ans = logical
   1

Notes

Only the one-argument form is implemented: the optional second argument ('dayofyear', 'dayofweek', 'name') is ignored and the day of the month is returned. day does not accept duration or calendarDuration input.

day