MATLAB: Does isdst work

datetimedaylight savings timeisdstMATLAB

Tried this today in Greenville Texas (CST)

>> isdst(datetime('now'))
0

Everything I read says Daylight Savings Time is from 2nd Sunday in March to 1st Sunday in November, so we should be in Daylight Savings Time now…

Have tried this with other dates too; i.e.,

>>isdst(datetime('062316','Format','MMddyy'))
0

23Jun2016 should have been in DST.

Looks like this is buggy?

Best Answer

datetime('now') is an example of an "unzoned" time -- it has no timezone attached. isdst() only works for datetime objects that have timezones.

>> isdst(datetime('now', 'timezone', 'America/Winnipeg'))
ans =
  logical
   1

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t = datetime(DateStrings,'InputFormat','dd/MM/yyyy');

MATLAB: Using now() in different time zones (or with daylight saving time)

If you want control over the time zone, you probably want to use datetime instead of now.

N1 = datetime('now', 'TimeZone', 'local')
N2 = datetime('now', 'TimeZone', 'America/New_York')
N3 = datetime('now', 'TimeZone', 'Europe/London')

See this documentation page for more information about working with dates and times with time zones. If you want to know if a datetime occurs during Daylight Savings Time, use isdst. When called on datetime arrays without a time zone set, isdst return false.

Best Answer

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