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Fix Date Validation in chunkDaysIntoWeeks Function #8876

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Merged
JhaSourav07 merged 1 commit into from
Aug 6, 2026
+10 −2
Merged

Fix Date Validation in chunkDaysIntoWeeks Function #8876

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12 changes: 10 additions & 2 deletions lib/calculate.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -557,8 +557,16 @@ export function chunkDaysIntoWeeks(
if (!day.date || typeof day.date !== 'string' || day.date.trim() === '') return false;
// Validate YYYY-MM-DD format
if (!/^\d{4}-\d{2}-\d{2}$/.test(day.date)) return false;
// Ensure it's a valid date
const dateObj = new Date(day.date);
// Validate date components (reject impossible dates like 2024-02-30)
const parts = day.date.match(/^(\d{4})-(\d{2})-(\d{2})$/);
if (!parts) return false;
const year = parseInt(parts[1], 10);
const month = parseInt(parts[2], 10);
const dayNum = parseInt(parts[3], 10);
if (month < 1 || month > 12) return false;
const daysInMonth = new Date(year, month, 0).getDate();
if (dayNum < 1 || dayNum > daysInMonth) return false;
const dateObj = new Date(year, month - 1, dayNum);
return !isNaN(dateObj.getTime());
});

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