Originally the Calendar was a program integrated in the Accessories.
Icon used in Windows 1.0 and 2.0
Icon used in Windows 3.0
Icon used in Windows 3.1, 95, 98, and ME. With the release of Windows XP the calendar program stopped being an accessory.
With the release of Windows Vista, the Calendar program became a service linked with Hotmail.
This icon was used on Windows Vista.
This icon was used on Windows 7.
In 2012, Hotmail Calendar was rebranded as Outlook Calendar. This icon was used on Windows 8 & Windows 8.1. This icon continued to be used on Outlook.com until the 2017 redesign.
This icon was used on Windows 10.
Icon with the Outlook logo.
This icon is used on Windows 10 and 10X.
Microsoft Windows apps
3D Builder | Alarms & Clock | Battery Saver | Calculator | Calendar | Camera | Clipping and Annotation | Clock | Console | Data Sense | Defender | Fax with Scanner | File Explorer | Fresh Paint | Games | Groove Music | Mail | Maps | Messages | Movies & TV | Notepad | Paint (3D) | People | Phone | Photos | Settings | Sticky Notes | Storage Sense | Microsoft Store | Tips | Wallet | Windows Installer | WordPad | Your Phone