SharePoint Timezone Settings

I recently had to troubleshoot some SharePoint Timezone issues. There are a bewildering number of places where this may be a factor:

These are nicely summarized at http://www.techgrowingpains.com/2012/05/sharepoint-time-zone-confusion-2/

• Web Application Level
• Central Administration->Manage Web Applications
• Select your web application
• Select General Settings
• Default Time Zone: Select time zone
• Site Collection Level
• Go to your site collection
• Site Actions->Site Settings->Regional Settings
• Select time zone
• User Level
• Welcome menu (aka Personal menu, aka the menu with your name on it)->My Settings->My Regional Settings
• Uncheck Always follow web settings (if checked)
• Select time zone

There is also

• Server time zone (across all farm servers)
• Desktop time zone