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The status on the right of each public holiday is now a button. Clicking it writes an override for that one date, and clicking it back removes the override rather than storing a row that agrees with the almanac. Because an override is keyed on an absolute date, the same holiday in other years is left alone — which is what was asked for and needed no schema change. The separate badge saying an override exists stays, so the fact that a day has been changed is not carried by the button alone. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ei7gCZzdd751uZtPzb1Pep