System.DateUtils.TTimeZone.IsAmbiguousTime
Delphi
function IsAmbiguousTime(const ADateTime: TDateTime): Boolean; inline;
C++
bool __fastcall IsAmbiguousTime(const System::TDateTime ADateTime);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | System.DateUtils.pas System.DateUtils.hpp |
System.DateUtils | TTimeZone |
Description
Checks whether the given local date and time is ambiguous.
The IsAmbiguousTime method checks whether the given local date and time are ambiguous (situated within the repeating hours).
An ambiguous time value may appear when the local time is about to be changed due to the DST (Daylight Savings Time) rules. For example: on the West Coast of the U.S., daylight saving time ends on the first Sunday in November, when after 1:59.9999 A.M. comes 1:00 A.M. again. November 6,2022, at 1:30 A.M. could be both UTC 11/6/2022 8:30 A.M. or 9:30 A.M. It is an ambiguous date and time value PST/PDT.