UKismetMathLibrary::Less_DateTimeDateTime

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Returns true if A is strictly earlier in time than B (A < B). Useful for sorting events or checking that a prerequisite timestamp precedes a target time.

Caveats & Gotchas

• Returns false when A equals B exactly — use LessEqual_DateTimeDateTime if the equal case should also pass.
• FDateTime comparison operates on the stored tick count with no calendar awareness. A date constructed with an incorrect year (e.g. off-by-one in month rollover logic) will silently compare incorrectly — validate FDateTime construction separately.

Signature

static UE_INL_API bool Less_DateTimeDateTime( FDateTime A, FDateTime B );

Parameters

Name	Type	Description	Default
A	FDateTime	The date-time to test.	—
B	FDateTime	The date-time to compare against.	—

Return Type

bool

Example

Sort events by timestamp C++

TArray<FScheduledEvent> Events;
Events.Sort([](const FScheduledEvent& A, const FScheduledEvent& B)
{
    return UKismetMathLibrary::Less_DateTimeDateTime(A.Time, B.Time);
});

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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