TYPO3 Core and PHP DateTime: Regional Timezone Conversion Consistency

TYPO3 stores timestamps in UTC to maintain database consistency, relying on the Global Configuration timezone setting and PHP's DateTimeZone classes for frontend and backend rendering. While the view helper allows for specific formatting, there is a potential for discrepancy when server-level PHP timezone settings differ from the TYPO3 internal configuration.

When integrating regional date conversions for multi-site installations, it is unclear how the system prioritizes the hierarchy between the global installation timezone, the site-specific configuration, and the underlying PHP environment settings during the rendering process.

• Does the helper default to the Global Configuration timezone if no specific timezone is provided in the template?
• How does TYPO3 resolve conflicts if the PHP date.timezone ini setting contradicts the TYPO3 Global Configuration?