UKismetMathLibrary::ToUnixTimestamp

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Returns the number of whole seconds elapsed since the Unix Epoch (1970-01-01 00:00:00 UTC). Sub-second precision is truncated.

Caveats & Gotchas

• FDateTime has no built-in time zone — if you pass a local-time FDateTime instead of a UTC one, the resulting Unix timestamp will be offset by the local UTC offset, making it incorrect when shared with other systems.
• Sub-second precision is lost because the return type is int64 (whole seconds). Use ToUnixTimestampDouble() if you need millisecond or finer resolution.

Signature

static UE_INL_API int64 ToUnixTimestamp(const FDateTime& Time);

Parameters

Name	Type	Description	Default
Time	const FDateTime&	The FDateTime to convert.	—

Return Type

int64

Example

Get current Unix timestamp C++

FDateTime UtcTime = UKismetMathLibrary::UtcNow();
int64 UnixTs = UKismetMathLibrary::ToUnixTimestamp(UtcTime);
UE_LOG(LogTemp, Log, TEXT("Unix timestamp: %lld"), UnixTs);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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