UKismetMathLibrary::DateTimeFromIsoString

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Parses a date/time string in ISO-8601 format into an FDateTime. Returns true on success, false if the string is malformed or out of range.

Caveats & Gotchas

• UE's parser does not handle timezone offsets in the ISO string (e.g. '2024-07-04T15:30:00+05:00'). The offset portion is ignored and the result is treated as-is, which may silently produce wrong UTC values.
• The Result parameter is not reset to a default on parse failure — always check the return value before using Result.

Signature

static UE_INL_API bool DateTimeFromIsoString(FString IsoString, FDateTime& Result);

Parameters

Name	Type	Description	Default
IsoString	FString	A date/time string in ISO-8601 format, e.g. "2024-07-04T15:30:00".	—
Result	FDateTime&	Output FDateTime populated on success; unchanged on failure.	—

Return Type

bool

Example

Parse a timestamp from a web API response C++

FString IsoStr = TEXT("2024-07-04T15:30:00");
FDateTime Parsed;
if (UKismetMathLibrary::DateTimeFromIsoString(IsoStr, Parsed))
{
    UE_LOG(LogTemp, Log, TEXT("Parsed: %s"), *Parsed.ToString());
}
else
{
    UE_LOG(LogTemp, Warning, TEXT("Failed to parse ISO date: %s"), *IsoStr);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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