Show additional calendar: registry value AllowConfigureTaskbarCalendar and 1 moreUserHKCU\Software\Policies\Microsoft\Windows\Settings

Policy ID: ConfigureTaskbarCalendar
Scope: User Configuration
Supported on: At least Windows Server 2016, Windows 10 Version 1703
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Start Menu and Taskbar

Registry

AllowConfigureTaskbarCalendar

REG_DWORDUser

HKCU\Software\Policies\Microsoft\Windows\Settings Current key

Enabled value: 1
Disabled value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Settings]

; Options (use only one)
; Enabled
"AllowConfigureTaskbarCalendar"=dword:00000001
; Disabled
"AllowConfigureTaskbarCalendar"=dword:00000000

CMD

:: Options (use only one)

:: Enabled
reg add "HKCU\Software\Policies\Microsoft\Windows\Settings" /v "AllowConfigureTaskbarCalendar" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKCU\Software\Policies\Microsoft\Windows\Settings" /v "AllowConfigureTaskbarCalendar" /t REG_DWORD /d 0 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\Software\Policies\Microsoft\Windows\Settings' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\Settings' -Name 'AllowConfigureTaskbarCalendar' -PropertyType DWord -Value 1 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\Settings' -Name 'AllowConfigureTaskbarCalendar' -PropertyType DWord -Value 0 -Force | Out-Null

ConfigureTaskbarCalendar

REG_DWORDUser

HKCU\Software\Policies\Microsoft\Windows\Settings Current key

Enabled value: Depends on the option value
Element: Calendar:

Options
Item	Stored value
Simplified Chinese (Lunar)	2
Traditional Chinese (Lunar)	3

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Settings]

; Options (use only one)
; Simplified Chinese (Lunar)
"ConfigureTaskbarCalendar"=dword:00000002
; Traditional Chinese (Lunar)
"ConfigureTaskbarCalendar"=dword:00000003

CMD

:: Options (use only one)

:: Simplified Chinese (Lunar)
reg add "HKCU\Software\Policies\Microsoft\Windows\Settings" /v "ConfigureTaskbarCalendar" /t REG_DWORD /d 2 /f
:: Traditional Chinese (Lunar)
reg add "HKCU\Software\Policies\Microsoft\Windows\Settings" /v "ConfigureTaskbarCalendar" /t REG_DWORD /d 3 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\Software\Policies\Microsoft\Windows\Settings' -Force | Out-Null

# Options (use only one)
# Simplified Chinese (Lunar)
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\Settings' -Name 'ConfigureTaskbarCalendar' -PropertyType DWord -Value 2 -Force | Out-Null
# Traditional Chinese (Lunar)
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Windows\Settings' -Name 'ConfigureTaskbarCalendar' -PropertyType DWord -Value 3 -Force | Out-Null