Isbooktoday Instant

type BookDayRule = | type: "fixed"; month: number; day: number; name: string | type: "floating"; month: number; weekday: number; occurrence: number; name: string ; // Example: first Thursday in March // occurrence: 1 = first, 2 = second, etc.

I’ll provide a clean, reusable version in TypeScript/JavaScript. Goal Return true if today (or a specified date) matches a predefined list of book-related days. Implementation // book-days.ts type BookDayRule = month: number; // 1-12 day: number; // 1-31 name: string; ; isbooktoday

Then implement a helper to compute the actual date. test("isBookToday returns true on April 23", () => const april23 = new Date(2026, 3, 23); expect(isBookToday(april23)).toBe(true); ); type BookDayRule = | type: "fixed"; month: number;

const found = BOOK_DAYS.find(bookDay => bookDay.month === month && bookDay.day === day); return found ? found.name : null; Implementation // book-days

// Optional: get the name of the book day if true export function getBookDayName(date: Date = new Date()): string | null const month = date.getMonth() + 1; const day = date.getDate();