date-fns

name	date-fns
description	Date handling in the AMC web repo — date-fns v4 for manipulation/formatting, shared helpers in src/lib/date.ts, reactive current time via realtimeDate.svelte.ts. Read before writing date logic.

date-fns

• All date manipulation and formatting uses date-fns v4 — no moment/dayjs/raw Date math.
• Check src/lib/date.ts for existing shared helpers before writing new ones; add reusable date utilities there.
• For UI that displays "now" reactively, use the rune helper in src/lib/realtimeDate.svelte.ts rather than manual setInterval.
• Displayed dates must respect the active locale — get it via getMtLocale (src/lib/utils/getMtLocale.ts) / paraglide runtime rather than hardcoding a locale.
• Season-related date config comes from PUBLIC_SEASON_START_DATE (ISO string with timezone offset) — parse it, don't re-declare it.

Related: [[env-config]], [[codebase-patterns]]