isdst

Determine daylight saving time elements

Syntax

tf = isdst(t)

Description

tf = isdst(t) returns an array the same size as t containing logical 1 (true) where the corresponding element of t is a datetime that occurs during Daylight Saving Time, and logical 0 (false) otherwise. isdst returns false for all elements when the TimeZone property of t is empty ('').

Examples

Determine If Datetime Occurs During Daylight Saving Time

t = datetime(2014,3,7:11,'TimeZone','America/New_York')

t = 1x5 datetime
   07-Mar-2014   08-Mar-2014   09-Mar-2014   10-Mar-2014   11-Mar-2014

tf = isdst(t)

tf = 1x5 logical array

   0   0   0   1   1

March 10 and March 11, 2014, in the America/New_York time zone occur during daylight saving time.

Input Arguments

t — Input date and time

datetime array

Input date and time, specified as a datetime array.

Extended Capabilities

Tall Arrays

Calculate with arrays that have more rows than fit in memory.

The isdst function fully supports tall arrays. For more information, see Tall Arrays.

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Distributed Arrays

Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.

This function fully supports distributed arrays. For more information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox).

Version History

Introduced in R2014b