RAD Studio VCL Reference
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DateUtils.StartOfTheDay Function

Returns a TDateTime that represents 12:00:00:00 AM on the day identified by a specified TDateTime.

Pascal
function StartOfTheDay(const AValue: TDateTime): TDateTime;
C++
TDateTime StartOfTheDay(const TDateTime AValue);

DateUtils

StartOfTheDay returns the first expressible moment of the same day as the TDateTime specified by AValue. That is, it replaces the time portion of AValue with 0 and returns the result. 

 

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