function createTimeUtils() { const checkValidTimestamp = (timestamp: string): boolean => { const parsedTimestamp = Date.parse(timestamp); if (isNaN(parsedTimestamp)) { return false; } const date = new Date(parsedTimestamp); if (date.getFullYear() < 1583 || date.getFullYear() > 9999) { return false; } return date.getFullYear() > 0; }; return { checkValidTimestamp }; } export const timeUtils = createTimeUtils();