Windows 10 launched in 2015 with a refreshed set of system sounds, and its Notify Calendar chime became one of the most familiar desktop alerts of that era. As screen recordings, tutorials and meme edits spread online, creators began lifting the sound to signal reminders outside Windows itself. It is often grouped with other short alerts like the Discord Notification and a simple ding sound effect, but its softer two-tone rise keeps it tied specifically to calendar events and scheduled reminders in viewers' minds.