diff --git a/package.json b/package.json
index 8331208..3b44082 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "rollup": "^4.25.0"
   },
   "dependencies": {
-    "@hebcal/core": "^5.8.0",
+    "@hebcal/core": "^5.8.2",
     "@hebcal/geo-sqlite": "^5.0.6",
     "@hebcal/hdate": "^0.12.0",
     "@hebcal/icalendar": "^6.0.2",
diff --git a/src/common.js b/src/common.js
index 4f537fc..0383c71 100644
--- a/src/common.js
+++ b/src/common.js
@@ -110,6 +110,7 @@ const optsToMask = {
   ykk: flags.YOM_KIPPUR_KATAN,
   molad: flags.MOLAD,
   min: flags.MINOR_HOLIDAY,
+  yzkr: flags.YIZKOR,
 };
 
 const booleanOpts = {
@@ -126,6 +127,7 @@ const booleanOpts = {
   molad: 'molad',
   yto: 'yomTovOnly',
   ue: 'useElevation',
+  yzkr: 'yizkor',
 };
 
 export const dailyLearningOpts = {
@@ -1328,6 +1330,7 @@ export const queryToName = {
   yyomi: 'Yerushalmi Yomi',
   dw: 'Daf-a-Week',
   dpa: 'Pirkei Avot',
+  yzkr: 'Yizkor',
 };
 
 export const queryLongDescr = {
@@ -1347,6 +1350,7 @@ export const queryLongDescr = {
   yyomi: 'Jerusalem Talmud (Vilna Edition)',
   dw: 'One page of Babylonian Talmud per week',
   dpa: 'Ethics of our Fathers, studied on Shabbat between Pesach and Rosh Hashana',
+  yzkr: 'Ashkenazi Jewish memorial prayer service for the dead recited in synagogue during four holidays yearly',
 };
 
 /**
diff --git a/src/deserializeDownload.js b/src/deserializeDownload.js
index 2b73411..0bee606 100644
--- a/src/deserializeDownload.js
+++ b/src/deserializeDownload.js
@@ -63,6 +63,7 @@ export function deserializeDownload(data) {
   if (msg.getTanakhyomi()) q.dty = 'on';
   if (msg.getPirkeiavotsummer()) q.dpa = 'on';
   if (msg.getUseelevation()) q.ue = 'on';
+  if (msg.getYizkor()) q.yzkr = 'on';
   q.month = msg.getMonth() || undefined;
   if (msg.getGeopos()) {
     q.latitude = msg.hasOldLatitude() ? msg.getOldLatitude() : msg.getLatitude();
diff --git a/src/download.proto b/src/download.proto
index 1bcfdfc..f85e600 100644
--- a/src/download.proto
+++ b/src/download.proto
@@ -71,4 +71,5 @@ message Download {
   bool useElevation = 53;
   bool tanakhYomi = 54;
   bool pirkeiAvotSummer = 55;
+  bool yizkor = 56;
 }
diff --git a/src/download_pb.cjs b/src/download_pb.cjs
index 635b2d5..b183179 100644
--- a/src/download_pb.cjs
+++ b/src/download_pb.cjs
@@ -205,7 +205,8 @@ proto.Download.toObject = function(includeInstance, msg) {
     elev: jspb.Message.getFieldWithDefault(msg, 52, 0),
     useelevation: jspb.Message.getBooleanFieldWithDefault(msg, 53, false),
     tanakhyomi: jspb.Message.getBooleanFieldWithDefault(msg, 54, false),
-    pirkeiavotsummer: jspb.Message.getBooleanFieldWithDefault(msg, 55, false)
+    pirkeiavotsummer: jspb.Message.getBooleanFieldWithDefault(msg, 55, false),
+    yizkor: jspb.Message.getBooleanFieldWithDefault(msg, 56, false)
   };
 
   if (includeInstance) {
@@ -450,6 +451,10 @@ proto.Download.deserializeBinaryFromReader = function(msg, reader) {
       var value = /** @type {boolean} */ (reader.readBool());
       msg.setPirkeiavotsummer(value);
       break;
+    case 56:
+      var value = /** @type {boolean} */ (reader.readBool());
+      msg.setYizkor(value);
+      break;
     default:
       reader.skipField();
       break;
@@ -843,6 +848,13 @@ proto.Download.serializeBinaryToWriter = function(message, writer) {
       f
     );
   }
+  f = message.getYizkor();
+  if (f) {
+    writer.writeBool(
+      56,
+      f
+    );
+  }
 };
 
 
@@ -1935,4 +1947,22 @@ proto.Download.prototype.setPirkeiavotsummer = function(value) {
 };
 
 
+/**
+ * optional bool yizkor = 56;
+ * @return {boolean}
+ */
+proto.Download.prototype.getYizkor = function() {
+  return /** @type {boolean} */ (jspb.Message.getBooleanFieldWithDefault(this, 56, false));
+};
+
+
+/**
+ * @param {boolean} value
+ * @return {!proto.Download} returns this
+ */
+proto.Download.prototype.setYizkor = function(value) {
+  return jspb.Message.setProto3BooleanField(this, 56, value);
+};
+
+
 goog.object.extend(exports, proto);
diff --git a/src/makeDownloadProps.js b/src/makeDownloadProps.js
index dcd5995..9eefbda 100644
--- a/src/makeDownloadProps.js
+++ b/src/makeDownloadProps.js
@@ -91,6 +91,7 @@ export function downloadHref2(query, filename, override={}) {
   if (on(q.dw)) msg.setDafweekly(true);
   if (on(q.dty)) msg.setTanakhyomi(true);
   if (on(q.dpa)) msg.setPirkeiavotsummer(true);
+  if (on(q.yzkr)) msg.setYizkor(true);
 
   if (on(q.ue)) msg.setUseelevation(true);
 
diff --git a/views/partials/hebcal-form.ejs b/views/partials/hebcal-form.ejs
index 5c1af74..1d67733 100644
--- a/views/partials/hebcal-form.ejs
+++ b/views/partials/hebcal-form.ejs
@@ -65,6 +65,11 @@ if (typeof year !== 'string' || year.length === 0) {
 <label class="form-check-label" for="ykk">Yom Kippur Katan</label>
  &nbsp;<span title="Minor day of atonement occurring monthly on the day preceding each Rosh Chodesh" data-bs-toggle="tooltip" data-bs-animation="false" data-bs-placement="top"><svg class="icon icon-sm mt-n1"><use xlink:href="<%=spriteHref%>#bi-info-circle-fill"></use></svg></span>
 </div><div class="form-check mb-2">
+<input class="form-check-input" type="checkbox" name="yzkr" value="on" <%= q.yzkr === 'on' ? 'checked' : '' %> id="yzkr">
+<label class="form-check-label" for="yzkr">Yizkor</label>
+ &nbsp;<span title="Ashkenazi Jewish memorial prayer service for the dead recited in synagogue during four holidays yearly"
+ data-bs-toggle="tooltip" data-bs-animation="false" data-bs-placement="top"><svg class="icon icon-sm mt-n1"><use xlink:href="<%=spriteHref%>#bi-info-circle-fill"></use></svg></span>
+</div><div class="form-check mb-2">
 <input class="form-check-input" type="checkbox" name="s" value="on" <%= q.s === 'on' ? 'checked' : '' %> id="s">
 <label class="form-check-label" for="s">Weekly Torah portion on Saturdays</label>
 </div></fieldset>