tz/LOCALE were evaluated once as module-level consts at script-load time. clearCache() (the header reload button) wipes localStorage right before reloading, so that reload could read an empty settings cache, fall back to the hardcoded 'Europe/Berlin' default, and stay locked to that wrong value for the rest of the page's life. Moved the reads inside localizeTimestamp() so they're evaluated fresh on every call instead.
Valiante
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