diff --git a/public/language/en-GB/topic.json b/public/language/en-GB/topic.json
index f7fcbc2465..81527bad22 100644
--- a/public/language/en-GB/topic.json
+++ b/public/language/en-GB/topic.json
@@ -43,6 +43,11 @@
 	"ban-ip": "Ban IP",
 	"view-history": "Edit History",
 
+	"wrote-ago": "wrote <span class=\"timeago\" title=\"%1\"></span>",
+	"wrote-on": "wrote on <span class=\"timeago\" title=\"%1\"></span>",
+	"replied-to-user-ago": "replied to <a component=\"post/parent\" data-topid=\"%1\" href=\"%2\">%3</a> <span class=\"timeago\" title=\"%4\"></span>",
+	"replied-to-user-on": "replied to <a component=\"post/parent\" data-topid=\"%1\" href=\"%2\">%3</a> on <span class=\"timeago\" title=\"%4\"></span>",
+
 	"user-locked-topic-ago": "%1 locked this topic %2",
 	"user-locked-topic-on": "%1 locked this topic on %2",
 	"user-unlocked-topic-ago": "%1 unlocked this topic %2",
diff --git a/public/src/modules/helpers.common.js b/public/src/modules/helpers.common.js
index 17a5b2c095..fb9ed1c4f4 100644
--- a/public/src/modules/helpers.common.js
+++ b/public/src/modules/helpers.common.js
@@ -3,6 +3,7 @@
 module.exports = function (utils, Benchpress, relative_path) {
 	Benchpress.setGlobal('true', true);
 	Benchpress.setGlobal('false', false);
+	const oneDayInMs = 24 * 60 * 60 * 1000;
 
 	const helpers = {
 		displayMenuItem,
@@ -24,6 +25,8 @@ module.exports = function (utils, Benchpress, relative_path) {
 		userAgentIcons,
 		buildAvatar,
 		increment,
+		generateRepliedTo,
+		generateWrote,
 		register,
 		__escape: identity,
 	};
@@ -320,6 +323,20 @@ module.exports = function (utils, Benchpress, relative_path) {
 		return value + parseInt(inc, 10);
 	}
 
+	function generateRepliedTo(post, timeagoCutoff) {
+		const username = post.parent && post.parent.username ?
+			post.parent.username : '[[global:guest]]';
+		const isBeforeCutoff = post.timestamp < (Date.now() - (timeagoCutoff * oneDayInMs));
+		const langSuffix = isBeforeCutoff ? 'on' : 'ago';
+		return `[[topic:replied-to-user-${langSuffix}, ${post.pid}, ${relative_path}/post/${post.pid}, ${username}, ${post.timestampISO}]]`;
+	}
+
+	function generateWrote(post, timeagoCutoff) {
+		const isBeforeCutoff = post.timestamp < (Date.now() - (timeagoCutoff * oneDayInMs));
+		const langSuffix = isBeforeCutoff ? 'on' : 'ago';
+		return `[[topic:wrote-${langSuffix}, ${post.timestampISO}]]`;
+	}
+
 	function register() {
 		Object.keys(helpers).forEach(function (helperName) {
 			Benchpress.registerHelper(helperName, helpers[helperName]);