diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04296c3fa..c94e40553 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,7 +28,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
 - api: fix infinite loop in function string_replace when the search string is empty
 - irc: fix tag in message with list of names when joining a channel
 - fset: remove error displayed in core buffer when clicking with the mouse below the last option displayed
-- guile, lua, perl, python: fix conversion of dates in the API functions
+- guile, lua, perl, python, ruby: fix conversion of dates in the API functions
 - irc: limit size of data received from the server to prevent memory exhaustion
 - irc: fix out-of-bounds read on incoming DCC command with a quoted filename ending the message ([#2322](https://github.com/weechat/weechat/issues/2322))
 - relay: limit size of decompressed websocket frame with permessage-deflate to prevent memory exhaustion ([GHSA-v2v4-45wm-5cr3](https://github.com/weechat/weechat/security/advisories/GHSA-v2v4-45wm-5cr3), [CVE-2026-53524](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-53524))
diff --git a/src/plugins/ruby/weechat-ruby-api.c b/src/plugins/ruby/weechat-ruby-api.c
index a5acd17cb..c91c7eaa8 100644
--- a/src/plugins/ruby/weechat-ruby-api.c
+++ b/src/plugins/ruby/weechat-ruby-api.c
@@ -2604,7 +2604,7 @@ weechat_ruby_api_print_date_tags (VALUE class, VALUE buffer, VALUE date,
     Check_Type (message, T_STRING);
 
     c_buffer = StringValuePtr (buffer);
-    c_date = NUM2ULONG (date);
+    c_date = NUM2ULL (date);
     c_tags = StringValuePtr (tags);
     c_message = StringValuePtr (message);
 
@@ -2639,7 +2639,7 @@ weechat_ruby_api_print_datetime_tags (VALUE class, VALUE buffer, VALUE date,
     Check_Type (message, T_STRING);
 
     c_buffer = StringValuePtr (buffer);
-    c_date = NUM2ULONG (date);
+    c_date = NUM2ULL (date);
     c_date_usec = NUM2INT (date_usec);
     c_tags = StringValuePtr (tags);
     c_message = StringValuePtr (message);
@@ -2703,7 +2703,7 @@ weechat_ruby_api_print_y_date_tags (VALUE class, VALUE buffer, VALUE y,
 
     c_buffer = StringValuePtr (buffer);
     c_y = NUM2INT (y);
-    c_date = NUM2ULONG (date);
+    c_date = NUM2ULL (date);
     c_tags = StringValuePtr (tags);
     c_message = StringValuePtr (message);
 
@@ -2741,7 +2741,7 @@ weechat_ruby_api_print_y_datetime_tags (VALUE class, VALUE buffer, VALUE y,
 
     c_buffer = StringValuePtr (buffer);
     c_y = NUM2INT (y);
-    c_date = NUM2ULONG (date);
+    c_date = NUM2ULL (date);
     c_date_usec = NUM2INT (date_usec);
     c_tags = StringValuePtr (tags);
     c_message = StringValuePtr (message);
@@ -6040,7 +6040,7 @@ weechat_ruby_api_infolist_new_var_time (VALUE class, VALUE item,
 
     c_item = StringValuePtr (item);
     c_name = StringValuePtr (name);
-    c_value = NUM2ULONG (value);
+    c_value = NUM2ULL (value);
 
     result = API_PTR2STR(weechat_infolist_new_var_time (API_STR2PTR(c_item),
                                                         c_name,