Week starts on: registry value start week dayUserHKCU\software\policies\microsoft\office\16.0\ms project\options\calendar

Policy ID
L_PjWeekStarts
Scope
User Configuration
Supported on
At least Windows Server 2008 R2 or Windows 7
Source
Microsoft 365 Apps / Office Administrative Templates (version 5568.1000)
Category
Microsoft Project 2016 › Project Options › Calendar

Registry

start week day

REG_DWORDUser
Enabled value
Depends on the option value
Element
Week starts on
Options
ItemStored value
Saturday6
Sunday0
Monday1
Tuesday2
Wednesday3
Thursday4
Friday5
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\ms project\options\calendar]

; Options (use only one)
; Saturday
"start week day"=dword:00000006
; Sunday
"start week day"=dword:00000000
; Monday
"start week day"=dword:00000001
; Tuesday
"start week day"=dword:00000002
; Wednesday
"start week day"=dword:00000003
; Thursday
"start week day"=dword:00000004
; Friday
"start week day"=dword:00000005
CMD
:: Options (use only one)

:: Saturday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 6 /f
:: Sunday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 0 /f
:: Monday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 1 /f
:: Tuesday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 2 /f
:: Wednesday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 3 /f
:: Thursday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 4 /f
:: Friday
reg add "HKCU\software\policies\microsoft\office\16.0\ms project\options\calendar" /v "start week day" /t REG_DWORD /d 5 /f
PowerShell
# Common: create the key
New-Item -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Force | Out-Null

# Options (use only one)
# Saturday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 6 -Force | Out-Null
# Sunday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 0 -Force | Out-Null
# Monday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 1 -Force | Out-Null
# Tuesday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 2 -Force | Out-Null
# Wednesday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 3 -Force | Out-Null
# Thursday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 4 -Force | Out-Null
# Friday
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\office\16.0\ms project\options\calendar' -Name 'start week day' -PropertyType DWord -Value 5 -Force | Out-Null