datetime

Handle timezone conversion by storing all datetime values in UTC internally and converting to KST explicitly at the response boundary using utility classes. This prevents local time discrepancies and ensures data integrity across application layers.

Storing local time instead of UTC causes bugs due to timezone discrepancies and daylight saving changes. A UTC-first approach establishes a single source of truth for internal processing, preventing common errors related to local time mismatches across application layers.

The best way to standardize datetime parsing and formatting is enforcing UTC as the single source of truth for internal processing. Utility classes handle parsing and formatting operations, while explicit timezone conversion to KST is applied only at the response boundary.

No, manual conversion is unnecessary. You ensure all incoming datetime inputs are UTC, and the provided utilities automatically process event data, store timestamps in UTC, and display them to users in KST without manual conversion logic in your application code.

Apply KST conversion specifically at the response boundary for user-facing displays. Internal storage and processing remain entirely in UTC, and you only convert to Korean Standard Time when presenting the datetime data to the end user.

Yes, this approach prevents local time discrepancies by standardizing datetime handling with UTC-first storage. Explicit conversion to KST at the response boundary ensures user-facing displays are accurate without compromising internal data integrity.