radio: quiet hours for reminders (default 23:00-07:30 Amsterdam, RADIO_QUIET_HOURS overrides)

src/lib/radio/IssPasses.svelte

@@ -4,10 +4,13 @@
 	import {
 		ISS_DOWNLINK_HZ,
 		ISS_MIN_EL,
+		QUIET_HOURS,
+		REMIND_MINUTES,
 		compass,
 		dayKey,
 		fmtTime,
 		formatFreq,
+		parseQuiet,
 		relDay,
 		until
 	} from './index.js';
@@ -100,7 +103,8 @@
 	<p class="meta foot">
 		{tle.name} TLE from Celestrak, epoch {tle.epoch ? fmtAgo(tle.epoch) : '?'}, fetched {tle.fetchedAt
 			? fmtAgo(tle.fetchedAt)
-			: '?'} (refreshed daily).
+			: '?'} (refreshed daily). Passes of {ISS_MIN_EL}° and up get a reminder {REMIND_MINUTES} min before,
+		except during quiet hours ({parseQuiet(QUIET_HOURS)?.label}).
 	</p>
 {/if}
 

src/lib/radio/Nets.svelte

@@ -12,7 +12,9 @@
 		BANDS,
 		BAND_LABEL,
 		DAY_SHORT,
+		QUIET_HOURS,
 		REMIND_MINUTES,
+		parseQuiet,
 		daysLabel,
 		fmtTime,
 		formatFreq,
@@ -118,7 +120,8 @@
 <section class="card">
 	<div class="bar">
 		<p class="meta">
-			Times are Amsterdam time. A bell sends an ntfy reminder {REMIND_MINUTES} minutes before each start.
+			Times are Amsterdam time. A bell sends an ntfy reminder {REMIND_MINUTES} minutes before each start,
+			except during quiet hours ({parseQuiet(QUIET_HOURS)?.label}).
 		</p>
 		<button
 			type="button"

src/lib/radio/index.test.ts

@@ -1,5 +1,15 @@
 import { describe, expect, it } from 'vitest';
-import { alphaTag, bankOf, nextOccurrence, occurrences, parseFreq, scannerCsv } from './index';
+import {
+	alphaTag,
+	bankOf,
+	fromZoned,
+	inQuiet,
+	parseQuiet,
+	nextOccurrence,
+	occurrences,
+	parseFreq,
+	scannerCsv
+} from './index';
 
 describe('parseFreq', () => {
 	it('reads MHz, kHz and Hz', () => {
@@ -77,3 +87,17 @@ describe('scanner', () => {
 		).toBeLessThanOrEqual(16);
 	});
 });
+
+describe('quiet hours', () => {
+	const q = parseQuiet('23:00-07:30');
+	it('parses and wraps midnight (Amsterdam time)', () => {
+		expect(q?.label).toBe('23:00–07:30');
+		expect(parseQuiet('off')).toBeNull();
+		expect(inQuiet(fromZoned(2026, 10, 27, 2, 11), q)).toBe(true);
+		expect(inQuiet(fromZoned(2026, 10, 27, 7, 1), q)).toBe(true);
+		expect(inQuiet(fromZoned(2026, 10, 27, 7, 30), q)).toBe(false);
+		expect(inQuiet(fromZoned(2026, 10, 26, 18, 55), q)).toBe(false);
+		expect(inQuiet(fromZoned(2026, 10, 26, 23, 0), q)).toBe(true);
+		expect(inQuiet(fromZoned(2026, 10, 26, 18, 55), null)).toBe(false);
+	});
+});

src/lib/radio/index.ts

@@ -40,6 +40,20 @@ export const ALPHA_TAG_MAX = 16;
 export const ISS_MIN_EL = 10;
 export const REMIND_MINUTES = 10;
 export const ISS_DOWNLINK_HZ = 145_800_000;
+/** No reminders are sent when the send time falls in this Amsterdam window (RADIO_QUIET_HOURS overrides). */
+export const QUIET_HOURS = '23:00-07:30';
+export type Quiet = { from: number; to: number; label: string } | null;
+/** "23:00-07:30" -> minutes of day; "off" / "" -> null (no quiet hours). */
+export function parseQuiet(spec: string | null | undefined): Quiet {
+	const m = /^\s*(\d{1,2}):(\d{2})\s*[-–]\s*(\d{1,2}):(\d{2})\s*$/.exec(spec ?? '');
+	if (!m) return null;
+	const from = Number(m[1]) * 60 + Number(m[2]);
+	const to = Number(m[3]) * 60 + Number(m[4]);
+	if (from > 1440 || to > 1440 || from === to) return null;
+	const pad = (n: number) =>
+		`${String(Math.floor(n / 60)).padStart(2, '0')}:${String(n % 60).padStart(2, '0')}`;
+	return { from, to, label: `${pad(from)}–${pad(to)}` };
+}
 
 export const DAY_SHORT = ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun'] as const;
 
@@ -312,3 +326,11 @@ export function alphaTag(name: string, marineCh?: string | null): string {
 	if (marineCh) s = `${marineCh} ${s}`;
 	return s.slice(0, ALPHA_TAG_MAX).trim();
 }
+
+/** Whether an instant falls in the quiet window (Amsterdam wall clock; the window may wrap midnight). */
+export function inQuiet(at: Date, quiet: Quiet): boolean {
+	if (!quiet) return false;
+	const z = zoned(at);
+	const t = z.h * 60 + z.min;
+	return quiet.from < quiet.to ? t >= quiet.from && t < quiet.to : t >= quiet.from || t < quiet.to;
+}