diff --git a/package-lock.json b/package-lock.json
index 6309fff..3b93437 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,7 +20,7 @@
         "jsqr": "1.4.0",
         "lucide-react": "^0.546.0",
         "motion": "^12.23.24",
-        "onehook-api-client": "^1.0.31",
+        "onehook-api-client": "^1.0.32",
         "qrcode.react": "^4.2.0",
         "react": "^19.0.1",
         "react-dom": "^19.0.1",
@@ -5704,9 +5704,9 @@
       }
     },
     "node_modules/onehook-api-client": {
-      "version": "1.0.31",
-      "resolved": "https://registry.npmjs.org/onehook-api-client/-/onehook-api-client-1.0.31.tgz",
-      "integrity": "sha512-viO4c+6Pa3brsz//Y0UHHLvAqxY1oAxRjoX+b+pBoAjrnuBGzZJH9UEQFKlW4AIp97RkTAbo2XR3V+KQLkl8Ow==",
+      "version": "1.0.32",
+      "resolved": "https://registry.npmjs.org/onehook-api-client/-/onehook-api-client-1.0.32.tgz",
+      "integrity": "sha512-7hNQH0WATbaDbC2zjhqin9Phw4t0R9GrTtqND53KBW/kGB6YjUUMKUE42nannxl4jDZSVtW24Wcg1+/T3mQlXA==",
       "license": "UNLICENSED",
       "dependencies": {
         "@aws-crypto/sha256-browser": "5.2.0",
diff --git a/package.json b/package.json
index 0576191..9b3b9af 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "jsqr": "1.4.0",
     "lucide-react": "^0.546.0",
     "motion": "^12.23.24",
-    "onehook-api-client": "^1.0.31",
+    "onehook-api-client": "^1.0.32",
     "qrcode.react": "^4.2.0",
     "react": "^19.0.1",
     "react-dom": "^19.0.1",
diff --git a/src/components/legal/Privacy.tsx b/src/components/legal/Privacy.tsx
index dbe7182..b318244 100644
--- a/src/components/legal/Privacy.tsx
+++ b/src/components/legal/Privacy.tsx
@@ -80,7 +80,11 @@ export function Privacy() {
             <h3 className="text-2xl font-bold mb-3 mt-6">Account Information</h3>
             <ul className="list-disc list-inside space-y-2 opacity-70">
               <li>Email address</li>
-              <li>Name and date of birth</li>
+              <li>Name and date of birth (required; your age is calculated from it and is never stored separately)</li>
+              <li>
+                Birth time, time zone and birthplace (optional; see{' '}
+                <a href="#birth-details" className="underline" data-track-exempt="duplicate: in-page anchor; the privacy screen view is already tracked">Date of birth and traditional compatibility</a>)
+              </li>
               <li>Location (geographic area only)</li>
               <li>Profile photos, videos, and audio (encrypted storage)</li>
               <li>Profile details, bio, and interests</li>
@@ -136,6 +140,40 @@ export function Privacy() {
                   available for non-critical)
                 </p>
               </div>
+              <div id="birth-details" className="scroll-mt-28">
+                <h4 className="font-bold mb-2">✓ Date of Birth and Traditional Compatibility</h4>
+                <div className="opacity-70 space-y-2">
+                  <p>
+                    <strong>Date of birth.</strong> You give it once, at sign-up. We use it to show your age
+                    (calculated fresh every time, never stored as a separate number), to keep OneHook adults-only
+                    (18+), and for age preferences in matching. Other members see your age, never your date of
+                    birth. You cannot change it yourself; if it is wrong, our support team can correct it after
+                    checking proof such as a government ID, at most twice per account, and each correction is
+                    recorded with the reason.
+                  </p>
+                  <p>
+                    <strong>Birth time, time zone and birthplace (optional).</strong> If you add them, together
+                    with your date of birth they are used for one purpose: estimating traditional compatibility
+                    between members (for example Kundali, Western natal charts, Bazi and Tzolk&apos;in). The
+                    result slightly changes the order in which profiles are suggested to you and to others; it
+                    never hides anyone and is never shown as a score. You can add, change or remove them at any
+                    time in your profile.
+                  </p>
+                  <p>
+                    <strong>How it is handled.</strong> We store the coordinates of your birthplace rounded to
+                    about 1 km, plus the place name you picked. Birth details are visible only to you. They are
+                    not shared with other members, not sent to our AI recommendation service, and removed from our
+                    analytics, which keep only your age at the time of an event. From these details we compute a
+                    short coded summary (a few bytes) that is used only for matching. Birthplace search is
+                    answered by Amazon Location Service; what you type is not stored.
+                  </p>
+                  <p>
+                    By entering your date of birth you consent to these uses; by adding birth time or place you
+                    consent to their use for traditional compatibility. You can withdraw that consent by removing
+                    the optional details from your profile.
+                  </p>
+                </div>
+              </div>
               <div>
                 <h4 className="font-bold mb-2">✗ We Do NOT Use Your Data For</h4>
                 <p className="opacity-70">
@@ -577,6 +615,14 @@ export function Privacy() {
                   Data deleted within 30 days of account deletion (except where required by law)
                 </p>
               </div>
+              <div>
+                <strong>Date of Birth and Birth Details:</strong>
+                <p className="opacity-70">
+                  Kept while your account is active and deleted with it, together with the matching summary
+                  computed from them and any record of a support correction. Removing your birth time or place
+                  deletes them and their summary straight away.
+                </p>
+              </div>
               <div>
                 <strong>Video Applications:</strong>
                 <p className="opacity-70">
@@ -626,7 +672,9 @@ export function Privacy() {
                 <strong>Right to Access:</strong> Request a copy of all your personal data we hold
               </li>
               <li>
-                <strong>Right to Correction:</strong> Update or correct inaccurate information
+                <strong>Right to Correction:</strong> Update or correct inaccurate information. Your date of
+                birth is corrected by our support team on request, with proof (see{' '}
+                <a href="#birth-details" className="underline" data-track-exempt="duplicate: in-page anchor; the privacy screen view is already tracked">section 3</a>)
               </li>
               <li>
                 <strong>Right to Deletion:</strong> Request permanent deletion of your account and
@@ -727,6 +775,9 @@ export function Privacy() {
                 SageMaker, hosted
                 in AWS (India region)
               </li>
+              <li>
+                <strong>Birthplace Search:</strong> Amazon Location Service, hosted in AWS (India region)
+              </li>
               <li>
                 <strong>Analytics:</strong> Hosted in AWS (India region)
               </li>
diff --git a/src/components/onboarding/BirthTimePlaceFields.tsx b/src/components/onboarding/BirthTimePlaceFields.tsx
new file mode 100644
index 0000000..603414e
--- /dev/null
+++ b/src/components/onboarding/BirthTimePlaceFields.tsx
@@ -0,0 +1,256 @@
+import { useEffect, useMemo, useRef, useState } from 'react';
+import { MapPin, Clock, X } from 'lucide-react';
+import { sdkClient } from '../../api/sdk-client';
+import { UiElement, trackProps } from '../../lib/analytics/analytics';
+
+/** The optional parts of birthDetails. Only the date is locked; these can change at any time. */
+export interface BirthTimePlace {
+  time?: string;
+  timeZone?: string;
+  latitude?: number;
+  longitude?: number;
+  placeName?: string;
+}
+
+interface Props {
+  value: BirthTimePlace;
+  onChange: (next: BirthTimePlace) => void;
+  /** Where the fields are shown: onboarding or the profile editor (telemetry id; never a value). */
+  surface?: 'onboarding' | 'profile';
+}
+
+const browserZone = (() => {
+  try {
+    return Intl.DateTimeFormat().resolvedOptions().timeZone;
+  } catch {
+    return 'UTC';
+  }
+})();
+
+const allZones: string[] = (() => {
+  try {
+    return (Intl as unknown as { supportedValuesOf(k: string): string[] }).supportedValuesOf(
+      'timeZone'
+    );
+  } catch {
+    return [browserZone, 'UTC'];
+  }
+})();
+
+/**
+ * Optional birth time and birthplace. Picking a place fills its coordinates and time zone (from Amazon
+ * Location via GET /profile/places/{id}); without a place the member can still choose a time zone so a
+ * birth time is meaningful. Everything here only refines traditional compatibility, never age.
+ */
+export function BirthTimePlaceFields({ value, onChange, surface = 'onboarding' }: Props) {
+  // Birth details are personal data: telemetry records only that a choice was made, never what.
+  const element =
+    surface === 'profile'
+      ? UiElement.PROFILE_EDIT_CHOICE_SELECT
+      : UiElement.ONBOARDING_CHOICE_SELECT;
+  const [query, setQuery] = useState(value.placeName ?? '');
+  const [results, setResults] = useState<{ placeId: string; label: string }[]>([]);
+  const [searching, setSearching] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const seq = useRef(0);
+
+  useEffect(() => {
+    const q = query.trim();
+    if (q.length < 2 || q === value.placeName) {
+      setResults([]);
+      return;
+    }
+    const mine = ++seq.current;
+    const timer = setTimeout(async () => {
+      setSearching(true);
+      try {
+        const res = await sdkClient.searchPlaces({ q, lang: navigator.language?.slice(0, 2) });
+        if (mine === seq.current)
+          setResults((res.places ?? []).map((p) => ({ placeId: p.placeId!, label: p.label! })));
+        setError(null);
+      } catch {
+        if (mine === seq.current) setError('Place search is unavailable right now.');
+      } finally {
+        if (mine === seq.current) setSearching(false);
+      }
+    }, 300);
+    return () => clearTimeout(timer);
+  }, [query, value.placeName]);
+
+  const choose = async (placeId: string) => {
+    setResults([]);
+    try {
+      const p = await sdkClient.getPlace({ placeId });
+      setQuery(p.label!);
+      onChange({
+        ...value,
+        placeName: p.label,
+        latitude: p.latitude,
+        longitude: p.longitude,
+        timeZone: p.timeZone ?? value.timeZone,
+      });
+    } catch {
+      setError('Could not load that place. Please pick it again.');
+    }
+  };
+
+  const clearPlace = () => {
+    setQuery('');
+    onChange({ ...value, placeName: undefined, latitude: undefined, longitude: undefined });
+  };
+
+  const zones = useMemo(() => allZones, []);
+  const zone = value.timeZone ?? (value.time ? browserZone : undefined);
+
+  return (
+    <div className="space-y-4 border border-border p-4">
+      <p className="text-xs opacity-70">
+        Optional. Your birth time and place only refine traditional compatibility (Kundali, natal
+        chart, Bazi and more). They are never shown to other members, and you can add or change them
+        at any time.
+      </p>
+
+      <div className="space-y-2">
+        <label
+          className="text-[10px] uppercase tracking-[0.3em] font-black opacity-50 flex items-center gap-2"
+          htmlFor="birth-time"
+        >
+          <Clock className="w-3 h-3" aria-hidden /> Birth time
+        </label>
+        <div className="flex gap-2 items-center">
+          <input
+            id="birth-time"
+            type="time"
+            value={value.time ?? ''}
+            onChange={(e) =>
+              onChange({
+                ...value,
+                time: e.target.value || undefined,
+                timeZone: value.timeZone ?? browserZone,
+              })
+            }
+            className="field-input"
+          />
+          {value.time && (
+            <button
+              type="button"
+              className="text-xs underline"
+              {...trackProps(element)}
+              onClick={() => onChange({ ...value, time: undefined })}
+            >
+              Clear
+            </button>
+          )}
+        </div>
+      </div>
+
+      <div className="space-y-2 relative">
+        <label
+          className="text-[10px] uppercase tracking-[0.3em] font-black opacity-50 flex items-center gap-2"
+          htmlFor="birth-place"
+        >
+          <MapPin className="w-3 h-3" aria-hidden /> Birthplace
+        </label>
+        <div className="flex gap-2 items-center">
+          <input
+            id="birth-place"
+            value={query}
+            placeholder="Start typing a city or town"
+            onChange={(e) => setQuery(e.target.value)}
+            className="field-input"
+            autoComplete="off"
+            role="combobox"
+            aria-expanded={results.length > 0}
+            aria-controls="birth-place-results"
+          />
+          {value.placeName && (
+            <button
+              type="button"
+              aria-label="Clear birthplace"
+              {...trackProps(element)}
+              onClick={clearPlace}
+            >
+              <X className="w-4 h-4" />
+            </button>
+          )}
+        </div>
+        {searching && <p className="text-xs opacity-60">Searching…</p>}
+        {error && <p className="text-xs text-red-600">{error}</p>}
+        {results.length > 0 && (
+          <ul
+            id="birth-place-results"
+            role="listbox"
+            className="absolute z-20 left-0 right-0 bg-white border border-border shadow-md max-h-60 overflow-auto"
+          >
+            {results.map((r) => (
+              <li key={r.placeId}>
+                <button
+                  type="button"
+                  role="option"
+                  aria-selected={false}
+                  className="w-full text-left px-3 py-2 text-sm hover:bg-accent/10"
+                  {...trackProps(element)}
+                  onClick={() => choose(r.placeId)}
+                >
+                  {r.label}
+                </button>
+              </li>
+            ))}
+          </ul>
+        )}
+        {value.latitude !== undefined && value.longitude !== undefined && (
+          <p className="text-xs opacity-60">
+            {value.latitude.toFixed(2)}, {value.longitude.toFixed(2)}
+          </p>
+        )}
+      </div>
+
+      <div className="space-y-2">
+        <label
+          className="text-[10px] uppercase tracking-[0.3em] font-black opacity-50 block"
+          htmlFor="birth-zone"
+        >
+          Time zone at birth
+        </label>
+        <select
+          id="birth-zone"
+          value={zone ?? ''}
+          onChange={(e) => onChange({ ...value, timeZone: e.target.value || undefined })}
+          className="field-input"
+        >
+          <option value="">Not set</option>
+          {zones.map((z) => (
+            <option key={z} value={z}>
+              {z}
+            </option>
+          ))}
+        </select>
+        <p className="text-xs opacity-60">
+          Filled in from the birthplace. Needed when you add a birth time.
+        </p>
+      </div>
+    </div>
+  );
+}
+
+/** The birthDetails payload: the (locked) date plus whatever optional fields are set. */
+export function birthDetailsPayload(date: string, extra: BirthTimePlace) {
+  const timeZone = extra.timeZone ?? (extra.time ? browserZone : undefined);
+  return {
+    date,
+    ...(extra.time ? { time: extra.time } : {}),
+    ...(timeZone ? { timeZone } : {}),
+    ...(extra.latitude !== undefined && extra.longitude !== undefined
+      ? { latitude: extra.latitude, longitude: extra.longitude, placeName: extra.placeName }
+      : {}),
+  };
+}
+
+export function sameTimePlace(a: BirthTimePlace, b: BirthTimePlace): boolean {
+  return (
+    a.time === b.time &&
+    a.timeZone === b.timeZone &&
+    a.latitude === b.latitude &&
+    a.longitude === b.longitude
+  );
+}
diff --git a/src/components/onboarding/OnboardingWizard.tsx b/src/components/onboarding/OnboardingWizard.tsx
index 2faa4f1..65c0604 100644
--- a/src/components/onboarding/OnboardingWizard.tsx
+++ b/src/components/onboarding/OnboardingWizard.tsx
@@ -22,6 +22,7 @@ import { LoadingSpinner } from '../common/LoadingSpinner';
 import { UserState } from '../../types';
 import { MediaImage } from '../common/MediaImage';
 import { DateOfBirthField } from './DateOfBirthField';
+import { BirthTimePlaceFields, birthDetailsPayload, type BirthTimePlace } from './BirthTimePlaceFields';
 import { ageOn, onboardingGateMessage, validateDob } from '../../utils/dob';
 import { useMediaSrc, isMediaKey } from '../../utils/media-url';
 import { getCognitoAuth } from '../../lib/cognito-auth';
@@ -201,6 +202,7 @@ export function OnboardingWizard() {
   const [birthDate, setBirthDate] = useState(storedDob);
   const [dobConfirmed, setDobConfirmed] = useState(Boolean(storedDob));
   const age = birthDate ? ageOn(birthDate) ?? 0 : 0;
+  const [birthExtra, setBirthExtra] = useState<BirthTimePlace>({});
   const [gender, setGender] = useState(currentUser?.gender || 'MALE');
   const [interestedInGenders, setInterestedInGenders] = useState<string[]>(
     currentUser?.interestedIn && currentUser.interestedIn.length > 0 ? currentUser.interestedIn : ['FEMALE']
@@ -437,7 +439,7 @@ export function OnboardingWizard() {
         displayName: displayName.trim(),
         bio: bio.trim(),
         // Age is derived by the server from birthDetails.date; `age` is no longer sent.
-        birthDetails: { date: birthDate },
+        birthDetails: birthDetailsPayload(birthDate, birthExtra),
         gender: gender || 'MALE',
         interestedIn: interestedInGenders.length > 0 ? interestedInGenders : ['FEMALE'],
         pictures: cleanedPictures,
@@ -472,7 +474,7 @@ export function OnboardingWizard() {
         name: displayName.trim(),
         displayName: displayName.trim(),
         age,
-        birthDetails: { date: birthDate },
+        birthDetails: birthDetailsPayload(birthDate, birthExtra),
         gender,
         interestedIn: interestedInGenders,
         bio: bio.trim(),
@@ -617,6 +619,13 @@ export function OnboardingWizard() {
               />
             )}
 
+            <details className="group">
+              <summary className="cursor-pointer text-sm font-bold">Add birth time and place (optional)</summary>
+              <div className="pt-3">
+                <BirthTimePlaceFields value={birthExtra} onChange={setBirthExtra} />
+              </div>
+            </details>
+
             <div className="space-y-3">
               <label className="text-[10px] uppercase tracking-[0.3em] font-black opacity-50 block">
                 Your Gender *
diff --git a/src/features/profile/ProfileView.tsx b/src/features/profile/ProfileView.tsx
index 1d2fd11..20ba9ce 100644
--- a/src/features/profile/ProfileView.tsx
+++ b/src/features/profile/ProfileView.tsx
@@ -26,6 +26,7 @@ import { useToast } from '../../components/common/Toast';
 import { LoadingSpinner } from '../../components/common/LoadingSpinner';
 import { MediaImage } from '../../components/common/MediaImage';
 import { DateOfBirthField, LockedDateOfBirth } from '../../components/onboarding/DateOfBirthField';
+import { BirthTimePlaceFields, birthDetailsPayload, sameTimePlace, type BirthTimePlace } from '../../components/onboarding/BirthTimePlaceFields';
 import { DOB_LOCKED_HINT, DOB_PROVISIONAL_HINT, ageOn, validateDob } from '../../utils/dob';
 import { pictureTransformStyle } from '../../utils/photo-transform';
 import { useMediaSrc } from '../../utils/media-url';
@@ -292,6 +293,19 @@ export function ProfileView({
   const [realDobConfirmed, setRealDobConfirmed] = useState(false);
   const realDobReady = dobIsProvisional && realDob !== '' && realDobConfirmed && !validateDob(realDob);
   const displayAge = (realDobReady ? ageOn(realDob) : null) ?? user.age;
+  // Birth time and place: optional, editable any time (only the date is locked).
+  const storedExtra: BirthTimePlace = {
+    time: user.birthDetails?.time ?? undefined,
+    timeZone: user.birthDetails?.timeZone ?? undefined,
+    latitude: user.birthDetails?.latitude ?? undefined,
+    longitude: user.birthDetails?.longitude ?? undefined,
+    placeName: user.birthDetails?.placeName ?? undefined,
+  };
+  const [birthExtra, setBirthExtra] = useState<BirthTimePlace>(storedExtra);
+  const birthDateForSave = realDobReady ? realDob : lockedDob;
+  const birthExtraChanged = !sameTimePlace(birthExtra, storedExtra) || birthExtra.placeName !== storedExtra.placeName;
+  const birthDetailsToSend =
+    birthDateForSave && (realDobReady || birthExtraChanged) ? birthDetailsPayload(birthDateForSave, birthExtra) : undefined;
 
   const [optional, setOptional] = useState({
     maxDistanceKm: String(prefs?.maxDistanceKm || '50'),
@@ -611,7 +625,7 @@ export function ProfileView({
       bio: trimmedBio,
       // Age is derived server-side from the immutable birth date and is never sent. A provisional
       // date may be replaced once by the real one, and only after the member confirmed it.
-      ...(realDobReady ? { birthDetails: { date: realDob } } : {}),
+      ...(birthDetailsToSend ? { birthDetails: birthDetailsToSend } : {}),
       gender: gender || 'MALE',
       interestedIn: interestedInGenders.length > 0 ? interestedInGenders : ['FEMALE'],
       pictures: photos,
@@ -682,7 +696,7 @@ export function ProfileView({
         displayName: trimmedDisplayName,
         bio: trimmedBio,
         age: displayAge,
-        ...(realDobReady ? { birthDetails: { date: realDob } } : {}),
+        ...(birthDetailsToSend ? { birthDetails: birthDetailsToSend } : {}),
         gender,
         interestedIn: interestedInGenders,
         pictures: photos,
@@ -1189,6 +1203,12 @@ export function ProfileView({
               </div>
             ) : null}
 
+            {(lockedDob || realDobReady) && (
+              <Field label="Birth time and place">
+                <BirthTimePlaceFields value={birthExtra} onChange={setBirthExtra} surface="profile" />
+              </Field>
+            )}
+
             <div className="grid grid-cols-2 gap-4">
               <Field label="Age">
                 <div className="field-input opacity-80" aria-readonly>
diff --git a/src/lib/analytics/generated/telemetryCatalog.ts b/src/lib/analytics/generated/telemetryCatalog.ts
index e31cf2d..33880e1 100644
--- a/src/lib/analytics/generated/telemetryCatalog.ts
+++ b/src/lib/analytics/generated/telemetryCatalog.ts
@@ -1,15 +1,15 @@
 // GENERATED FILE - DO NOT EDIT.
-// telemetry-integrity: sha256 34a4918a54cc60e7ee0259d51cd8fba1a6167c89465599a00f3f8ef937c44004
+// telemetry-integrity: sha256 58537cc25dd8d2b5efc5013938a7736b405cb73c3dde1478ad852430db1e082c
 // Source of truth: OneHookBackend/packages/telemetry/src/catalog.ts
 // Regenerate: (OneHookBackend) npm run telemetry:generate && npm run telemetry:sync
-// Catalog version 1.8.0, hash 9a56f9fef0ed4ae7.
+// Catalog version 1.9.0, hash 7f0a0b33ce88bee5.
 //
 // HARD RULE: every user interaction MUST emit ui_interaction with an id from THIS file, and
 // ids are controlled by the backend. Read TELEMETRY_CONTRACT.txt (printed by every build).
 /* eslint-disable */
 
-export const TELEMETRY_CATALOG_VERSION = "1.8.0";
-export const TELEMETRY_CATALOG_HASH = "9a56f9fef0ed4ae7";
+export const TELEMETRY_CATALOG_VERSION = "1.9.0";
+export const TELEMETRY_CATALOG_HASH = "7f0a0b33ce88bee5";
 
 /** Every signal type the ingest accepts. */
 export const SignalType = {
@@ -705,7 +705,7 @@ export const UI_ELEMENTS: { readonly [K in UiElementId]: UiElementSpec } = {
   "profile_edit.prompt_remove": { screen: "PROFILE_EDIT", kind: "button", actions: ["tap"], values: null, platforms: ["web", "ios"] },
   "profile_edit.voice_add": { screen: "PROFILE_EDIT", kind: "button", actions: ["tap"], values: null, platforms: ["web", "ios"] },
   "profile_edit.voice_remove": { screen: "PROFILE_EDIT", kind: "button", actions: ["tap"], values: null, platforms: ["web", "ios"] },
-  "profile_edit.choice_select": { screen: "PROFILE_EDIT", kind: "segmented", actions: ["select", "tap"], values: null, platforms: ["web", "ios"] },
+  "profile_edit.choice_select": { screen: "PROFILE_EDIT", kind: "segmented", actions: ["select", "tap"], values: null, platforms: ["web", "ios", "android"] },
   "preferences.save": { screen: "PREFERENCES", kind: "button", actions: ["submit"], values: null, platforms: ["ios", "android"] },
   "preferences.upgrade_open": { screen: "PREFERENCES", kind: "button", actions: ["tap", "dismiss"], values: null, platforms: ["ios"] },
   "preferences.locked_filter_tap": { screen: "PREFERENCES", kind: "button", actions: ["tap"], values: null, platforms: ["ios"] },
diff --git a/src/tests/birth-time-place.test.ts b/src/tests/birth-time-place.test.ts
new file mode 100644
index 0000000..fd0ec8b
--- /dev/null
+++ b/src/tests/birth-time-place.test.ts
@@ -0,0 +1,27 @@
+import { describe, it, expect } from 'vitest';
+import { birthDetailsPayload, sameTimePlace } from '../components/onboarding/BirthTimePlaceFields';
+
+describe('birth time and place payload', () => {
+  it('sends only the date when nothing optional is set', () => {
+    expect(birthDetailsPayload('1990-05-17', {})).toEqual({ date: '1990-05-17' });
+  });
+  it('a birth time always carries a time zone', () => {
+    const p = birthDetailsPayload('1990-05-17', { time: '08:30', timeZone: 'Asia/Kolkata' });
+    expect(p).toEqual({ date: '1990-05-17', time: '08:30', timeZone: 'Asia/Kolkata' });
+    expect(birthDetailsPayload('1990-05-17', { time: '08:30' }).timeZone).toBeTruthy();
+  });
+  it('a place carries coordinates and its label, never coordinates alone without both', () => {
+    const p = birthDetailsPayload('1990-05-17', {
+      latitude: 30.91,
+      longitude: 75.85,
+      placeName: 'Ludhiana',
+      timeZone: 'Asia/Kolkata',
+    });
+    expect(p).toMatchObject({ latitude: 30.91, longitude: 75.85, placeName: 'Ludhiana' });
+    expect(birthDetailsPayload('1990-05-17', { latitude: 30.91 })).not.toHaveProperty('latitude');
+  });
+  it('detects changes', () => {
+    expect(sameTimePlace({ time: '08:30' }, { time: '08:30' })).toBe(true);
+    expect(sameTimePlace({ time: '08:30' }, { time: '09:30' })).toBe(false);
+  });
+});