WebStorm IDE Date Conversion vs Node.js Time Zone Database

WebStorm provides automatic Date object completion and locale-sensitive formatting via the ECMAScript Internationalization API (Intl), yet the interoperability with Node.js time zone handling remains uneven across releases. The IDE's refactoring tools flag ambiguous time zone usage, suggesting explicit IANA IDs, but inconsistent conversion between string formats and Date objects—particularly between legacy Date.parse and modern alternatives—produces non-deterministic results depending on the host environment's time zone database version. This discrepancy affects team collaborations where date strings are parsed or serialized without explicit time zone specification. What factors cause WebStorm's inline formatting hints to diverge from Node.js runtime behavior when processing date strings across major Node.js versions? How does the IDE's time zone awareness align with the Node.js time zone database update cycle? What guidance can developers rely on to ensure deterministic date conversion in mixed IDE and runtime environments.