UKismetMathLibrary::DateTimeMinValue

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Returns the minimum representable FDateTime value, corresponding to January 1, year 1 at 00:00:00. Useful as a sentinel for 'unset' or 'beginning of time' date fields.

Caveats & Gotchas

• The minimum value is year 1 AD, not year 0 — FDateTime has no concept of year 0 or BC dates. Subtracting any duration from the minimum overflows.
• Default-constructed FDateTime() also equals the minimum value, so checking against DateTimeMinValue() is the idiomatic way to detect an uninitialized date.

Signature

static UE_INL_API FDateTime DateTimeMinValue( );

Return Type

FDateTime

Example

Detect unset date field C++

FDateTime LastSeen; // default-constructed = min value
if (LastSeen == UKismetMathLibrary::DateTimeMinValue())
{
    UE_LOG(LogTemp, Warning, TEXT("LastSeen has never been set."));
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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