diff --git a/inc/bans.php b/inc/bans.php
index 8ea3b921..126d38b8 100644
--- a/inc/bans.php
+++ b/inc/bans.php
@@ -1,5 +1,6 @@
 <?php
 
+use Vichan\Functions\Format;
 use Lifo\IP\CIDR;
 
 class Bans {
@@ -371,7 +372,7 @@ class Bans {
 		$query->execute() or error(db_error($query));
 		if (isset($mod['id']) && $mod['id'] == $mod_id) {
 			modLog('Created a new ' .
-				($length > 0 ? preg_replace('/^(\d+) (\w+?)s?$/', '$1-$2', until($length)) : 'permanent') .
+				($length > 0 ? preg_replace('/^(\d+) (\w+?)s?$/', '$1-$2', Format\until($length)) : 'permanent') .
 				' ban on ' .
 				($ban_board ? '/' . $ban_board . '/' : 'all boards') .
 				' for ' .
diff --git a/inc/functions.php b/inc/functions.php
index 71231203..c18ca57e 100755
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -797,42 +797,6 @@ function listBoards($just_uri = false) {
 	return $boards;
 }
 
-function until($timestamp) {
-	$difference = $timestamp - time();
-	switch(TRUE){
-	case ($difference < 60):
-		return $difference . ' ' . ngettext('second', 'seconds', $difference);
-	case ($difference < 3600): //60*60 = 3600
-		return ($num = round($difference/(60))) . ' ' . ngettext('minute', 'minutes', $num);
-	case ($difference < 86400): //60*60*24 = 86400
-		return ($num = round($difference/(3600))) . ' ' . ngettext('hour', 'hours', $num);
-	case ($difference < 604800): //60*60*24*7 = 604800
-		return ($num = round($difference/(86400))) . ' ' . ngettext('day', 'days', $num);
-	case ($difference < 31536000): //60*60*24*365 = 31536000
-		return ($num = round($difference/(604800))) . ' ' . ngettext('week', 'weeks', $num);
-	default:
-		return ($num = round($difference/(31536000))) . ' ' . ngettext('year', 'years', $num);
-	}
-}
-
-function ago($timestamp) {
-	$difference = time() - $timestamp;
-	switch(TRUE){
-	case ($difference < 60) :
-		return $difference . ' ' . ngettext('second', 'seconds', $difference);
-	case ($difference < 3600): //60*60 = 3600
-		return ($num = round($difference/(60))) . ' ' . ngettext('minute', 'minutes', $num);
-	case ($difference <  86400): //60*60*24 = 86400
-		return ($num = round($difference/(3600))) . ' ' . ngettext('hour', 'hours', $num);
-	case ($difference < 604800): //60*60*24*7 = 604800
-		return ($num = round($difference/(86400))) . ' ' . ngettext('day', 'days', $num);
-	case ($difference < 31536000): //60*60*24*365 = 31536000
-		return ($num = round($difference/(604800))) . ' ' . ngettext('week', 'weeks', $num);
-	default:
-		return ($num = round($difference/(31536000))) . ' ' . ngettext('year', 'years', $num);
-	}
-}
-
 function displayBan($ban) {
 	global $config, $board;
 
diff --git a/inc/functions/format.php b/inc/functions/format.php
new file mode 100644
index 00000000..79a71021
--- /dev/null
+++ b/inc/functions/format.php
@@ -0,0 +1,28 @@
+<?php
+namespace Vichan\Functions\Format;
+
+
+function format_timestamp(int $delta): string {
+	switch (true) {
+		case $delta < 60:
+			return $delta . ' ' . ngettext('second', 'seconds', $delta);
+		case $delta < 3600: //60*60 = 3600
+			return ($num = round($delta/ 60)) . ' ' . ngettext('minute', 'minutes', $num);
+		case $delta < 86400: //60*60*24 = 86400
+			return ($num = round($delta / 3600)) . ' ' . ngettext('hour', 'hours', $num);
+		case $delta < 604800: //60*60*24*7 = 604800
+			return ($num = round($delta / 86400)) . ' ' . ngettext('day', 'days', $num);
+		case $delta < 31536000: //60*60*24*365 = 31536000
+			return ($num = round($delta / 604800)) . ' ' . ngettext('week', 'weeks', $num);
+		default:
+			return ($num = round($delta / 31536000)) . ' ' . ngettext('year', 'years', $num);
+	}
+}
+
+function until(int $timestamp): string {
+	return format_timestamp($timestamp - time());
+}
+
+function ago(int $timestamp): string {
+	return format_timestamp(time() - $timestamp);
+}
diff --git a/inc/mod/pages.php b/inc/mod/pages.php
index 1e803424..c3aa7110 100644
--- a/inc/mod/pages.php
+++ b/inc/mod/pages.php
@@ -3,9 +3,11 @@
 /*
  *  Copyright (c) 2010-2013 Tinyboard Development Group
  */
+use Vichan\Functions\Format;
 
 defined('TINYBOARD') or exit;
 
+
 function mod_page($title, $template, $args, $subtitle = false) {
 	global $config, $mod;
 
@@ -1553,7 +1555,7 @@ function mod_ban_post($board, $delete, $post, $token = false) {
 
 		if (isset($_POST['public_message'], $_POST['message'])) {
 			// public ban message
-			$length_english = Bans::parse_time($_POST['length']) ? 'for ' . until(Bans::parse_time($_POST['length'])) : 'permanently';
+			$length_english = Bans::parse_time($_POST['length']) ? 'for ' . Format\until(Bans::parse_time($_POST['length'])) : 'permanently';
 			$_POST['message'] = preg_replace('/[\r\n]/', '', $_POST['message']);
 			$_POST['message'] = str_replace('%length%', $length_english, $_POST['message']);
 			$_POST['message'] = str_replace('%LENGTH%', strtoupper($length_english), $_POST['message']);
diff --git a/inc/template.php b/inc/template.php
index 19c0d8b8..e6549d07 100644
--- a/inc/template.php
+++ b/inc/template.php
@@ -121,8 +121,8 @@ class Tinyboard extends Twig\Extension\AbstractExtension
 			new Twig\TwigFilter('date', 'twig_date_filter'),
 			new Twig\TwigFilter('poster_id', 'poster_id'),
 			new Twig\TwigFilter('count', 'count'),
-			new Twig\TwigFilter('ago', 'ago'),
-			new Twig\TwigFilter('until', 'until'),
+			new Twig\TwigFilter('ago', 'Vichan\Functions\Format\ago'),
+			new Twig\TwigFilter('until', 'Vichan\Functions\Format\until'),
 			new Twig\TwigFilter('push', 'twig_push_filter'),
 			new Twig\TwigFilter('bidi_cleanup', 'bidi_cleanup'),
 			new Twig\TwigFilter('addslashes', 'addslashes'),
diff --git a/post.php b/post.php
index 22bc67fa..e3f0682d 100644
--- a/post.php
+++ b/post.php
@@ -8,6 +8,7 @@ require_once 'inc/bootstrap.php';
 use Vichan\{Context, WebDependencyFactory};
 use Vichan\Driver\{HttpDriver, Log};
 use Vichan\Service\{RemoteCaptchaQuery, NativeCaptchaQuery};
+use Vichan\Functions\Format;
 
 /**
  * Utility functions
@@ -394,14 +395,14 @@ if (isset($_POST['delete'])) {
 			}
 
 			if ($post['time'] < time() - $config['max_delete_time'] && $config['max_delete_time'] != false) {
-				error(sprintf($config['error']['delete_too_late'], until($post['time'] + $config['max_delete_time'])));
+				error(sprintf($config['error']['delete_too_late'], Format\until($post['time'] + $config['max_delete_time'])));
 			}
 
 			if ($password != '' && $post['password'] != $password && (!$thread || $thread['password'] != $password))
 				error($config['error']['invalidpassword']);
 
 			if ($post['time'] > time() - $config['delete_time'] && (!$thread || $thread['password'] != $password)) {
-				error(sprintf($config['error']['delete_too_soon'], until($post['time'] + $config['delete_time'])));
+				error(sprintf($config['error']['delete_too_soon'], Format\until($post['time'] + $config['delete_time'])));
 			}
 
 			$ip = $_SERVER['REMOTE_ADDR'];