One edge case doesn&#x27;t disprove a rule, and timezone&#x2F;DST rules changing is definitely an edge case.<p>For internationalisation storing in UTC is still the gold standard, since it remains consistent with itself across time and DST zones.<p>Storing in local and then converting from one timezone to another timezone on demand has far more edge cases and gotchas. Plus it too isn&#x27;t immune from rule changes, if you store in local time (e.g. 10 am) but DST rules changes, from an outside observer&#x27;s perspective (someone in any other timezone) the meeting&#x27;s time has now changed.<p>So even just using that edge case you&#x27;re talking about exchange one downside (local time changes) to another downside (remote time changes).